Which of the following aids in skeletal muscle relaxation after contraction?

Question

A) acetylcholinesterase degrades acetylcholine
B) Calcium is released from intra ceullular storage sites
C) Motor neurons send electrical signals to the muscle
D) sodium is released from intracellular stroage sites
E) troponin binds calcium

Answer 1

A. Your nerves induce muscles to contract by secreting a neurotransmitter, acetylcholine. This binds with receptors, which depolarize the plasma membrane, propagating an action potential down to the "T tubules", which stimulate release of Calcium ions from the sarcoplasmic reticulum. These calcium ions bonds with troponin, which changes the shape and allows mysin to move along actin, contracting the muscle. Then, actylcholinesterase breaks down the ACh, and thus action potential ends. Calcium is then pumped back into the SR

Answer 2

A.

Acetylcholine (Ach) is released by the motor neurons to stimulate depolarization of the muscle cell. Acetylcholinsterase catalyzes its breakdown into an acetyl group and choline, effectively discontinuing the depolarizing effect. As this transpires, the muscle begins to relax.

Answer 3

the right answer is B the degree of muscle stretch is affect the strength or force of skeletal muscle contraction