PHYSIOLOGY
MUSCLE CONTRACTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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an electrical signal sent in neurons and muscle fibers used to transmit messages.
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an electrical signal sent only in muscle fibers used to create a contraction.
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a property of muscle fibers that allows contraction to occur.
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a specialized structure found within the muscle fiber that is used for contraction.
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Detailed explanation-1: -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. The action potential is an explosion of electrical activity that is created by a depolarizing current.
Detailed explanation-2: -Neurons communicate with each other via electrical events called ‘action potentials’ and chemical neurotransmitters. At the junction between two neurons (synapse), an action potential causes neuron A to release a chemical neurotransmitter.
Detailed explanation-3: -Action potentials (those electrical impulses that send signals around your body) are nothing more than a temporary shift (from negative to positive) in the neuron’s membrane potential caused by ions suddenly flowing in and out of the neuron.
Detailed explanation-4: -Introduction. An action potential is a rapid sequence of changes in the voltage across a membrane. The membrane voltage, or potential, is determined at any time by the relative ratio of ions, extracellular to intracellular, and the permeability of each ion.
Detailed explanation-5: -Action potentials are electrical signals carried along neurons. Synapses are chemical or electrical junctions that allow electrical signals to pass from neurons to other cells. Electrical signals in muscles cause contraction and movement.