PHYSIOLOGY
MUSCLE CONTRACTION
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Action Potential
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A positive charge
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membrane resting potential
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A negative Charge
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Detailed explanation-1: -The resting membrane potential is a result of different concentrations inside and outside the cell. The difference in the number of positively charged potassium ions (K+) inside and outside the cell dominates the resting membrane potential (Figure 2). Figure 2.
Detailed explanation-2: -The resting membrane potential (RMP) in mammalian skeletal muscle is about-90 mV [l-51 and is essentially the conse-quence of the K+ concentration ratio existing across the sarcolemmal membrane, the permeability of K + being about 100-fold higher than that of Na+.
Detailed explanation-3: -The resting potential tells about what happens when a neuron is at rest. An action potential occurs when a neuron sends information down an axon, away from the cell body. Neuroscientists use other words, such as a “spike” or an “impulse” for the action potential.
Detailed explanation-4: -The resting potential is the amount of power that is available to a cell to maintain its homeostatic state. It is usually measured in terms of the power of a neuron, which is the smallest amount of electrical charge that can be produced by a neuron.