Locomotion And Movement Question 63
Question: Before stimulating the release of calcium ions that causes muscle contraction in skeletal muscle, an action potential must pass through the:
Options:
A) Sarcoplasmic reticulum
B) T-tubules and Sarcoplasmic reticulum
C) Plasma membrane and T-tubules
D) Plasma membrane, T-tubules and Sarcoplasmic reticulum
Show Answer
Answer:
Correct Answer: C
Solution:
[c] The action potential is initiated on the plasma membrane at the neuromuscular junction.
It then $ C{a^{2+}} $ before reaching the triads that initiate the opening of the channels of the sarcoplasmic reticulum.
BETA
