Number the following statements in their proper sequence to describe the contraction mechanism in a skeletal muscle cell. _____ A. Acetylcholine is released into the neuromuscular junction by the axonal terminal. _____ B. The action potential, carried deep into the cell, causes the sarcoplasmic reticulum to release calcium ions. ____ C. The muscle cell relaxes and lengthens. _____ D. Acetylcholine diffuses across the neuromuscular junction and binds to receptors on the sarcolemma. ____ E. The calcium ion concentration at the myofilaments increases; the myofilaments slide past one another, and the cell shortens.
BIO168 Human Anatomy & Physiology I
Practice Worksheet B
Sequence of muscle contraction
Number the following statements in their proper sequence to describe the contraction mechanism in a skeletal muscle cell.
_____ A. Acetylcholine is released into the neuromuscular junction by the axonal terminal.
_____ B. The action potential, carried deep into the cell, causes the sarcoplasmic reticulum to release calcium ions.
____ C. The muscle cell relaxes and lengthens.
_____ D. Acetylcholine diffuses across the neuromuscular junction and binds to receptors on the sarcolemma.
____ E. The calcium ion concentration at the myofilaments increases; the myofilaments slide past one another, and the cell shortens.
_____ F. Depolarization occurs, and the action potential is generated.
_____ G. As calcium is actively reabsorbed into the sarcoplasmic reticulum, its concentration at the myofilaments decreases.
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 1 images
