{"key":"action potential steps in muscle contraction","title":["Muscle Contraction | BioNinja","7 Steps of Muscle Contraction Flashcards | Quizlet","6 steps in muscle contraction Flashcards | Quizlet","5 Steps of Muscle Contraction Cycle Flashcards | Quizlet","Muscle Contractions | Learn Muscular Anatomy - Visible Body","Depolarization | bioelectricity | Britannica","Sliding Filament Theory, Sarcomere, Muscle Contraction, Myosin ...","12 steps of muscle contraction Flashcards | Quizlet","8 Steps of muscle contraction Flashcards | Quizlet","Muscle Contraction: Regulation - Squire - - Major Reference Works ...","Calcium: For strong bones, muscle function, and so much more!","Rigor mortis in an unusual position: Forensic considerations","Topics \u2013 The Moments After a Death \u2013 Canadian Virtual Hospice","The macabre fate of 'beating heart corpses' - BBC Future - BBC.com","Rigor Mortis Facts That Will Surprise You | Facts.net","Cadaveric spasm - Wikipedia","rigor - Dictionary Definition : Vocabulary.com","Decomposition - Body Changes - The Australian Museum","12 Steps to Muscle Contraction","Stages of A Muscle Contraction","12 Steps to Muscle Contraction.pdf - Edlio URL Shortener","The Mechanism of Muscle Contraction - Meat Science","Neural Stimulation of Muscle Contraction | Biology for Majors II","12 Steps On How Muscle Contractions Take Place In Your ...","10.3 Muscle Fiber Excitation, Contraction, and Relaxation ...","Skeletal Muscle \u2013 Anatomy and Physiology","Describe the sliding filament theory of muscle contraction.","Muscle Physiology Dynamics of Muscle Contraction","The Physiology of Skeletal Muscle Contraction \u2014 PT Direct","SKELETAL MUSCLE PHYSIOLOGY - BYU-Idaho","Muscle Contraction - CliffsNotes","Muscle Action Potential - an overview | ScienceDirect Topics","Physiology, Skeletal Muscle - StatPearls - NCBI Bookshelf","Human Physiology - Muscle","Signaling in Muscle Contraction - NCBI - NIH","Muscle Contraction \u2013 An Interactive Tutorial","Skeletal muscle physiology | BJA Education | Oxford Academic","action potential | Definition, Steps, & Facts | Britannica","20 Steps of Muscle Contraction according to ... - StudyStack","Describe the important steps in muscle contraction. - Toppr","Physiology, Skeletal Muscle Contraction Article - StatPearls","Muscle Conduction to Contraction - MSK - Medbullets Step 1","Excitation Contraction Coupling - Muscle Physiology","Skeletal Muscle Tissue - Palm Beach State College","Muscle Stimulation and Contraction - MCAT Biology","motor neuron","Complete Muscle Contraction Quiz","Neuromuscular Junction and Arrival of Action Potential and ...","Synaptic Transmission at the Skeletal Neuromuscular Junction","Action Potentials and Muscle Contraction - Mheducation","Cardiac Muscle Contraction - UBC Zoology","Contraction and rigor mortis - Animal Biosciences","All play and no work: skits and models in teaching skeletal ...","Muscle and Neuromuscular Junction - Medical Cell Biology","Help me put the 6 steps of muscle contraction in order? - Wyzant","Skeletal muscle fatigue \u2013 regulation of excitation\u2013contraction ...","Voltage sensing mechanism in skeletal muscle excitation ...","The Role of the Neuromuscular Junction in Muscle Contraction","Excitation Contraction Coupling in smooth muscle","Contraction in skeletal muscle - WikiLectures","How Do Muscles Contract: Steps to Muscle Contraction","Neuromuscular junction - Wikipedia","Cardiac Excitation-Contraction Coupling - CV Physiology","Steps of the Neuromuscular Junction & Sliding Filament ...","Sequence of Events in Muscular Contraction","CARDIAC MUSCLE","Muscles and Muscle Tissue - Pearson","From synaptic input to muscle contraction: arm muscle cells of ...","Muscle Fiber Contraction and Relaxation \u2013 Anatomy ...","Effects of Action Potential Duration on Excitation-Contraction ...","10.3 Muscle Fiber Contraction and Relaxation - Anatomy and ...","Muscle Physiology Vocabulary","Calcium ions - The School of Biomedical Sciences Wiki","Store-operated Ca 2+ entry is activated by every action ...","Excitation - Contraction coupling - SlideShare","Muscle Physiology \u2013 Muscle Types & Contraction | Lecturio","Molecular Mechanism of Muscle Contraction","Level 11 - Chapter 11- Muscle Tissue - Anatomy & Physiology ...","Muscular System, Chapter 10","Smooth Muscle Contraction - Associate Degree Nursing ...","Nervous control of muscular contraction","Solved: Put The Following Steps Of Muscle Contraction In O ...","muscle worksheet answers-1.pdf - Madeira City Schools","Muscle Structure And Control Of Contraction - Muscle System ...","Excitation-Contraction Coupling - GetBodySmart","Contraction Physiology | Excitation-Contraction Coupling","Electrophysiology of Gastrointestinal Smooth Muscle","Physiology of cardiac conduction and contractility | McMaster ...","Muscle Contraction & Rigor Mortis - Belle Vernon Area School ...","Phases of the Cardiac Action Potential - Sciencing","Muscle Contraction | CK-12 Foundation","Neuromuscular junction: Parts, structure and steps | Kenhub","Chapter 4.2 Peripheral Nerve and Muscle Stimulation - Case ...","CH 09 Sliding Filament Mechanism - APSU Biology","6.3 \u2013 Muscle Contraction \u2013 Introductory Animal Physiology","What is an Action Potential, Action Potential Chart, Membrane ...","Cross-bridge Cycle | Protocol - JoVE","Muscle Contraction & Sliding Filament Theory - TeachPE.com","Cardiac Action Potential","Action Potential - The Definitive Guide | Biology Dictionary","Steps in Excitation Contraction Coupling ... Note: T type ...","10.3 Muscle Fiber Contraction and Relaxation \u2013 Douglas ...","The Skeletal Muscle Contraction Cycle - Course Hero","Muscle contraction","The Essential Role of Electrolytes in Skeletal Muscle Contraction","Muscle contraction - Osmosis","Anatomy and Physiology I-NMJ, Steps of Skeletal Muscle ...","Muscle Contraction: Regulation - Squire - - Major Reference ...","Molecular Aspects of Muscular Contraction","Muscle Contraction Classroom Activity - LifeSciTRC.org","Action Potentials Made Easy: Cardiac Myocyte (Heart Muscle ...","NM transmission: Ions - OpenAnesthesia","The sliding filament theory 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A Muscle Contraction Is Triggered When an Action Potential Travels Along the Nerves to the Muscles. Muscle contraction begins when the nervous system generates a signal. The signal, an impulse called an action potential, travels through a type of nerve cell called a motor neuron.","muscle contraction In muscle: Release of acetylcholine from the nerve terminal. The channels are opened by depolarization (an increase in membrane potential) of the nerve terminal membrane and selectively allow the passage of calcium ions.","Within the sarcomere, myosin slides along actin to contract the muscle fiber in a process that requires ATP. Scientists have also identified many of the molecules involved in regulating muscle contractions and motor behaviors, including calcium, troponin, and tropomyosin.","Vertebrate striated muscle contraction is controlled (regulated) by the action of the proteins troponin and tropomyosin on the actin filaments. Nervous stimulation causes a depolarisation of the muscle membrane (sarcolemma) which triggers the release of calcium ions from the sarcoplasmic reticulum.","Calcium's positive molecule is important to the transmission of nerve impulses to the muscle fiber via its neurotransmitter triggering release at the junction between the nerves (2,6). Inside the muscle, calcium facilitates the interaction between actin and myosin during contractions (2,6).","Rigor mortis is a postmortem change resulting in the stiffening of the body muscles due to chemical changes in their myofibrils. Rigor mortis helps in estimating the time since death as well to ascertain if the body had been moved after death.","The body may release stool from the rectum, urine from the bladder, or saliva from the mouth. This happens as the body's muscles relax. Rigor mortis , a stiffening of the body muscles, will develop in the hours after death.","The reflex causes the dead to sit up, briefly raise their arms and drop them, crossed, onto their chests. It happens because while most reflexes are mediated by the brain, some are overseen by \u201creflex arcs\u201d, which travel through the spine instead.","Cadaveric spasm, also known as postmortem spasm, instantaneous rigor, cataleptic rigidity, or instantaneous rigidity, is a rare form of muscular stiffening that occurs at the moment of death and persists into the period of rigor mortis.","Rigor means thoroughness and exhaustiveness\u2013\u2013the gold standard for a good teacher. ... You may have heard of \"rigor mortis\"\u2013\u2013which is a medical term describing the stiffness of a body after death. Rigor used to mean stiffness outside of the corpse context, i.e., sternness.","Brain cells can die if deprived of oxygen for more than three minutes. Muscle cells live on for several hours. Bone and skin cells can stay alive for several days. It takes around 12 hours for a human body to be cool to the touch and 24 hours to cool to the core.","Na+ ions diffuse into the muscle fiber and depolarization occurs. Depolarization creates a wave of action potential (electrical current) across the sarcolemma ...","Let's look a little more closely at the steps in the mechanism of muscle contraction. 1. A Muscle Contraction Is Triggered When an Action Potential Travels Along ...","ACh binds with the sarcolemma. Step 3). Muscle Fiber Action Potential. i). ACh binds with receptors and opens Na+ channels. bullet ...","The following steps are involved in muscle contraction: ... (3) The axon branches to supply a number of muscle fibers called a motor unit, and the action potential ...","The essence of the sliding filament model of muscle contraction is the action of actin and myosin sliding past each other. ... between the action potential generated in the sarcolemma and the start of a muscle contraction. ... Step 1: Acetylcholine.","Start studying 7 Steps of Muscle Contraction. Learn vocabulary, terms, and more ... Action potential generated, which stimulates muscle. Step 1. Ca2+ released.","steps to muscle contraction nerve impulse travels to the neuromuscular junction on muscle cell. ... Depolarization creates a wave of action potential (electrical.","Explain the process involved with initiating muscle contraction and relaxation ... Sodium ions enter the muscle fiber, and an action potential rapidly spreads (or ... its limit and must be \u201cre-cocked\u201d before it can pull again, a step that requires ATP.","Muscle contraction requires energy, and when ATP is broken down, heat is ... The muscle fiber action potential, which sweeps along the sarcolemma as a wave, ... In other words, the \u201cexcitation\u201d step in skeletal muscles is always triggered by ...","Place the following steps in order of how a muscle contracts a) neuron ... 7) Sarcolemma (membrane) depolarizes and the muscle gets the action potential.","A. Muscle movement (=contraction) occurs at the microscopic level of ... Muscle Contraction\u201410 Steps. 1. A nerve ... When the action potential ends Ca +2 ions.","The Sliding Filament Theory. For a contraction to occur there must first be a stimulation of the muscle in the form of an impulse (action potential) from a motor ...","An important part of understanding the full story of muscle contraction is understanding how ... Step 01. Download a page sized image of the neuromuscular junction. ... An action potential arrives at the axon terminal of a somatic motor neuron.","Phases of a muscle contraction. A muscle contraction in response to a single nerve action potential is called a twitch contraction. A myogram, ...","This sequence is called the excitation\u2013contraction\u2013relaxation cycle. An early step in this cycle is the release of stored calcium from an intracellular membrane ...","Action potentials create muscle contraction through ... At the beginning of this cycle, myosin is bound tightly to actin in a step termed rigor.","A muscle fiber is excited via a motor nerve that generates an action potential that spreads along the ... This, as you will see, is a key step in muscle contraction.","The action potential stimulates L-type calcium channels (also known as dihydropyridine receptors). In skeletal muscle, these are mechanically coupled to the SR ...","What happens when the action potential enters the muscle fiber? ... Place the following steps to the contraction cycle in order, after the active sites on the actin ...","Physiological skeletal muscle contraction requires generation and ... The resulting generation of the endplate potential is the first step in muscle contraction. ... A skeletal muscle action potential is generated when the motor ...","In the neuron an action potential produces the nerve impulse, and in the muscle cell it produces the contraction required for all movement. Sometimes called a ...","Step 2, The action potential stimulates the opening of voltage-gated CA2+ chaneels along the axon terminal membrane, allowing the CA2+ to rush into the axon ...","Step 2: The generation of this action potential releases calcium ions from the sarcoplasmic reticulum in the sarcoplasm. Step 3: The increased calcium ions in ...","Excitation-contraction coupling refers to the mechanism that converts the action potentials mentioned above in the muscle fibers into muscle ...","T-tubules are responsible for conducting the action potential to the cisternae of the sarcoplasmic reticulum. skeletal muscle triad. 1 T-tubule and ...","In much the same way as a battery creates an electrical potential difference by having different concentrations of ions at its two poles, so does a ...","9.7 Describe the role of ATP in a muscle contraction, and explain the steps involved in the contraction of a skeletal ... 5 steps in an action potential (continued). 4.","The first step in muscle contraction is the release of calcium ions from the sarcoplasmic reticulum; therefore, a change in membrane potential (action potential) will ...","voluntary muscle contraction? *What was the stimulus ... a muscle action potential. This electrical ... Steps 4-6 will continue to repeat as long as. ATP and Ca. 2+.","PRACTICE QUIZ OF COMPLETE MUSCLE CONTRACTION FROM ARRIVAL OF ACTION POTENTIAL! PLEASE PRINT THIS PAGE AND THEN NUMBER THE ...","Arrival of the Action Potential at the Neuromuscular junction ... YOURSELF WITH A PRACTICE QUIZ ON THE SEQUENCE OF MUSCLE CONTRACTION.","Action potentials in skeletal muscle cells are due to ionic mechanisms similar to ... What are the other steps in the process of chemical synaptic transmission? ... The action potential initiates the process of excitation contraction coupling and the ...","There are 4 steps involved with blood entering the heart: 1) oxygen poor ... 4) The action potential in cardiac cells is quite different from skeletal muscle and ...","The main steps involved in a single contraction are as follows. ... (6) The action potential spreads deep inside the muscle fibre, carried by transverse tubules.","These models were used to demonstrate key steps involved in actin and myosin ... The molecular events of skeletal muscle contraction were also ... Student 3 (muscle action potential) ran along the border of the area that had ...","... of contraction. \u2022Triggering muscle contraction ... communicate via gap junctions which allows action potentials to pass from one cell to the next. Note that the ...","Help me put the 6 steps of muscle contraction in order? A). Attached to the head of the myosin an ATP molecule is hydrolyzed causing the \u201cflexing ...","Contractions in skeletal muscle are triggered when action potentials are ... ATP binding permits dissociation of the myosin head from actin [step (iv) in the figure].","The muscle action potential (AP) travels both longitudinally away from ... induces muscle contraction is a change in membrane potential rather ... Critical steps: voltage sensor currents and charge movements in skeletal muscle.","It thus follows that any one muscle fibre is innervated by only one motor neuron. The set of muscle fibres that contract when an action potential propagates down ...","Excitation-Contraction Coupling: Some of the most important differences between ... When an action potential depolarizes the muscle cell membrane, it also ... There is still once more step before relaxation can truly begin - the myosin light ...","Skeletal muscle contraction - Step by Step","An action potential in a motor neuron causes acetylcholine to release in the synaptic cleft. muscle contraction steps. Acetylcholine binds with receptors on the cell ...","The endplate potential is thus responsible for setting up an action potential in the muscle fiber which triggers muscle contraction. The transmission from nerve to ...","Key steps in cardiac excitation-contraction coupling: Action potentials traveling along the sarcolemma and down into the transverse tubule (T-tubule) system ...","Sodium (Na+) ions which rush into the muscle cell, and Potassium (K+) diffuses ... Once begun, the action potential is unstoppable, ... Muscle contraction occurs.","The sequence begins with the initiation of an action potential by the motor nerve. This impulse is propagated over the entire surface of the muscle fiber as the cell ...","Name three ways in which smooth muscle contraction is initiated. 4. Explain ... Explain the contractile cardiac myocyte action potential. 8. Explain the ... Step 2, myofilaments are activated by the binding of Ca++ to the thin filaments. Step 3. SR.","whole muscle contraction? 9.6 How do ... The action potential is automatically propagated along the ... Figure 9.7 The phases leading to muscle fiber contraction.","The octopus muscle action potential (AP) is primarily mediated by a ... in steps every 20 s until an action potential and cell contraction were ...","Muscle contraction usually stops when signaling from the motor neuron ends, which ... and must be \u201cre-cocked\u201d before it can pull again, a step that requires ATP. ... junction (NMJ) to trigger depolarization, and an action potential travels along ...","We used the action potential voltage-clamp technique on ventricular myocytes loaded ... As demonstrated previously in rat ventricular myocytes, depolarizing steps elicit only ... Cardiac Muscle: The Regulation of Excitation and Contraction.","... as positively charged sodium ions (Na+) enter, triggering an action potential that ... Muscle contraction usually stops when signaling from the motor neuron ends, ... by a series of steps that begins with Ca++ entry into the sarcoplasm. ... Each cycle requires energy, and the action of the myosin heads in the ...","Acetylocholine; Actin; Action Potential; Aerobic Respiration; Aponeuroses; Axon ... Steps for stimulations of a muscle contraction: 1) action potential generates ...","Ca2+ ions play an important role in muscle contraction by creating interactions ... As an action potential reaches the presynaptic membrane of a ...","The SOCE transient was shaped by action potential frequency and SR Ca2+ ... coupling (EC coupling) and provides the basis for muscle contraction. ... Thus, the depletion steps and with it the underlying calcium flux were ...","Mechanism of Skeletal Muscle Contraction (Excitation Contraction ... coupling Electrical Event Action potential generated in muscle fiber ... STEPS IN CONTRACTION Neurotransmitter acetylcholine (ACh) binds to its ...","Muscle Physiology \u2013 Skeletal, Smooth   Cardiac Muscle Contraction. Last update ... The action potential comprises 3 phases: Notch phase: ...","Contraction is triggered when an action potential in a somatic motor neuron reaches the neuromuscular junction\u2014the junction between the neuron and the ...","excitation. process in which action potentials in the nerve fiber lead to action potentials in the muscle fiber; first step of muscle contraction. first steps of excitation.","Part I, Muscle: Mechanisms of Contraction and Neural Control,. Chapter ... Explain the steps involved in the contraction and relaxation of a skeletal muscle fiber. 8. ... Response includes the generation of an electrical impulse (action potential).","Steps to Excitation-Contraction Coupling and Muscle Contraction: ... The action potential is propagated along (across) the sarcolemma and travels through the T ...","Muscle contraction is initiated by the nervous system which together with the ... Once the action potential has reached the end of an axon, the mediator is ...","Muscle Action Potential Spreads Over The Sarcolemma. Calcium Is Released From Terminal Cisternae Of The Sarcoplasmic Reticulum. -Acetylcholine (ACh) Is ...","Then contraction of the muscle cell occurs. rane. 7. ... A motor neuron and all of the skeletal muscle cells it stimulates is called a. The axon of each motor ... This action potential is carried down the tubules and deep into the muscle cell. As the.","The action potential moves deep into the muscle cell via small infoldings of the sarcolemma called T-tubules. T-tubules facilitate the uniform contraction of the ...","The wave of action potentials enters the muscle fiber at the transverse (T) ... An animation describing the steps of excitation-contraction steps ...","Stimulation of the muscle fiber by the ACh neurotransmitter generates waves of image description action potentials (impulses) that spread out ...","The resting membrane potential of smooth muscle cells is between -50 and -60 mV. ... Spike potentials are true action potentials that elicit muscle contraction. ... One can now step back and understand how a particular pattern of motility is ...","The action potential in typical cardiomyocytes is composed of 5 phases (0-4), ... which an electrical action potential leads to contraction of cardiac muscle cells.","Muscle Contraction   Rigor Mortis \u2013 50 Informal Points ... or paragraph) as well as with a simple diagram the steps to muscle contraction. ... An electrical charge is received from a neuron, stimulating an action potential along the muscle fiber.","The cardiac cell action potential, like action potentials in nerves, is divided ... to diastole, or the interval between contractions of heart muscle.","The sequence of events begins when an action potential is initiated in the cell body of a motor neuron, and the action potential is propagated ...","The activation of many muscle fibers together causes muscles to contract, ... end plate of the muscle fiber, means that the electrical signal or action potential, ... receptors in the motor end plate region causing continued muscle contraction.","propagating action potential may not result in a detectable response. ... carrier could result in a transient loss of induced muscle contraction 64. As the ... than closer axon is extended from that shown with the single step pre-pulse (region.","excitation-contraction coupling - The arrival of a nerve impulse (action potential) at the axon terminal of the neuro-muscular junction leads to ... g. the repetition of the actions of steps b through e above cause the sliding of the actin fibers over ...","6.3. Describe steps involved in muscle contraction. ... This is an electrical event, called an action potential, that can be used as a cellular signal. Communication ...","Examples of cells that signal via action potentials are neurons and muscle cells. Action Potential Graph. Stimulus starts the rapid change in voltage or action ...","As a regulator of muscle contraction, calcium concentration is very closely ... This generates an action potential (depolarization) in the muscle cell, that is carried ...","Sliding filament theory is the method by which muscles are thought to contract. ... Tropomyosin: An actin-binding protein that regulates muscle contraction. ... overlapping of the myosin and actin with lots of potential for cross bridges to form.","autorhythmic muscle cell. \u2022 To understand the ionic basis of an action potential in a cardiac contractile ... slide over each other resulting in muscle contraction. ... What are the three steps in the initiation of action potential in an autorhythmic cell?","Heart Muscle","Muscle Contraction Steps \u00b7 Steps in Excitation Contraction Coupling ... Note: T type channel ( brings Action potential close to SR ), Terminal cistern, Types of ...","Describe the physiology of muscle contraction, including the roles of the following ... When the action potential travels along each T-tubule, the voltage-sensitive ... limit and must be \u201cre-cocked\u201d before it can pull again, a step that requires ATP.","Action potentials create a signal from the brain. The message travels along motor neuron axons to reach the synaptic bouton. At that point, action potentials ...","No stable RMP -- have pacemaker potential instead. ... For role of calmodulin in smooth muscle contraction, see Becker fig. ... ATP is used to power sliding of thick and thin filaments -- steps (1 to 4)   states (A to E) match those ...","These steps reverse when a muscle relaxes (sodium moves out of the cell, and potassium back in). Calcium (Ca++). In a relaxed state, calcium ...","Learn and reinforce your understanding of Muscle contraction through video. Muscle contraction is the activation of tension-generating sites within muscle fibers. ... Skeletal Muscle Contraction Action. Picmonic. Skeletal Muscle ... USMLE\u00ae Step 1 Study ScheduleCOMLEX-USA\u00ae Level 1 Study Schedule.","Anatomy and Physiology I-NMJ, Steps of Skeletal Muscle Contraction, Energy ... Respiration|Action Potential|ATPase|Creatine Phosphate|Glycolysis|Lactic ...","Vertebrate striated muscle contraction is controlled (regulated) by the action of the proteins troponin and tropomyosin on the actin filaments.","Contemporary thought on the mechanism of muscular contraction can be ... these products from myosin is slow and is the rate-limiting step in the overall cycle. ... An action potential causes a charge movement in a protein of the T tubule.","Muscle Contraction Classroom Activity ... I hope to adapt it to demonstrate action potential in nerve cells and to ... Interesting group activity to demonstrate the various steps in the process of excitation-contraction coupling.","Action potential physiology phases and steps made easy. ... of cardiac atrial ventricular myocyte muscle cells that lead to contraction and heart ...","The basic steps or this process are as follows: Action potential arrives at the terminal portion of the axon, which causes a conformational change ... of the muscle fiber leading to a cascade of other ions ultimately leading to muscle contraction.","Step 1: A muscle contraction starts in the brain, where a signal is sent to ... muscle fibre is activated by an action potential from a motor neuron ..."],"related":["steps of skeletal muscle contraction","steps of muscle contraction quizlet","6 steps of muscle contraction","12 steps of muscle contraction","10 steps of muscle contraction","5 steps of muscle contraction","muscle contraction process","7 steps of muscle contraction"],"ask":["What are the 7 steps of muscle contraction?","What are the 6 steps of muscle contraction?","What are the 5 steps of muscle contraction?","How does action potential work in muscle contraction?","What is depolarization in muscle contraction?","Which are involved in muscle contraction?","What are the 12 steps of muscle contraction?","What are the 4 steps of muscle contraction?","What are the 8 steps of muscle contraction?","How is muscle contraction normally controlled?","What is the role of calcium in muscle contraction?","What is rigor mortis?","Do you poop when you die?","Why are corpses arms crossed?","What are the 3 stages of rigor mortis?","What is it called when a body moves after death?","What is a rigor?","How long does a dead body stay warm?"],"strong":["muscle","action potential","steps","muscle contraction","step","contraction","phases","action potentials","step in muscle contraction","potential","contractions","muscle contraction steps","muscle action potential","contraction steps","muscular","muscle contraction action","action","muscular contraction"]}