Match each term with its corresponding definition or description.
-a neuron and all the muscle fibers it stimulates
A)Actin
B)Sarcolemma
C)Contractility
D)Tropomyosin
E)Extensibility
F)Myosin
G)T-tubule
H)Irritability
I)Sarcomere
J)Troponin
K)Motor unit

Question

Quizplus · Accepted Answer

A motor unit is a neuron and all the muscle fibers it stimulates.

Answer: B
 Sarcolemma is the plasma membrane surrounding a muscle fiber.

Answer: C
 Contractility is the ability of a muscle to contract and generate tension.

Answer: D
 Tropomyosin is a protein that blocks the binding sites on actin molecules during muscle relaxation.

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

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

Answer: G
 T-tubules are invaginations of the sarcolemma that allow electrical signals to penetrate deep into the muscle fiber.

Answer: H
 Irritability is the ability of a muscle to respond to a stimulus.

Answer: I
 Sarcomere is the basic contractile unit of a muscle fiber.

Answer: J
 Troponin is a protein that binds to calcium and triggers muscle contraction.

Match Each Term with Its Corresponding Definition or Description