Match each term with its corresponding definition or description.
-A neuron and all the muscle fibers it stimulates

Question

Quizplus · Accepted Answer

A motor unit refers to a neuron (nerve cell) and all the muscle fibers it stimulates.

Answer: B
 Sarcolemma is the plasma membrane of a muscle cell.

Answer: C
 Contractility is the ability of muscles to shorten and generate force.

Answer: D
 Tropomyosin is a protein that blocks the myosin-binding sites on actin molecules, preventing muscle contraction when a muscle is at rest.

Answer: E
 Extensibility is the ability of muscles to stretch without being damaged.

Answer: F
 Myosin is a protein that interacts with actin to generate force and cause muscle contraction.

Answer: G
 T-tubules are extensions of the sarcolemma that penetrate deep into the muscle fiber and allow for the rapid transmission of electrical impulses.

Answer: H
 Irritability (also called excitability) is the ability of muscles to respond to stimuli, such as nerve impulses, and generate a muscle contraction.

Answer: I
 Sarcomeres are the basic functional units of muscle fibers, consisting of overlapping thick and thin filaments that create the striated appearance of muscle tissue.

Answer: J
 Troponin is a protein complex that regulates the interaction between actin and myosin during muscle contraction.

Match Each Term with Its Corresponding Definition or Description