An action potential causes depolarization of the T tubule membrane. True or False True False
An action potential causes depolarization of the T tubule membrane. True or False True False
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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An action potential causes depolarization of the T tubule membrane
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How do nerve impulses cause muscle contraction? Skeletal muscle is under voluntary control. Nerve impulses that
originate in the central nervous system cause muscles to contract. Both neurons and muscle tissue conduct electrical
current by moving ions across cellular membranes. A motor neuron ends in a synapse with a muscle fiber. The neuron
releases acetylcholine and transfers the action potential to the muscle tissue. The signal will travel through the tissue and
trigger the contraction of individual sarcomeres. One synapse generally controls an entire muscle fiber. One motor neuron
usually controls several adjacent muscle fibers. A group of fibers under the control of a single motor neuron is known as a
motor unit. View the animation below, then complete the quiz to test your knowledge of the concept.
True or False
Action potential
True
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An action potential causes depolarization of the T tubule membrane.
PROD
200
Sarcomere in myofibril
(located in sarcoplasm)
False
PROD
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