Match each term with its corresponding definition or description.
-beadlike globular protein that makes up the thin myofilament
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

Actin is the beadlike globular protein that makes up the thin myofilament.

Answer: F
 Myosin is a protein that constitutes the thick myofilament.

Answer: D
 Tropomyosin is a regulatory protein that wraps around the groove of actin.

Answer: J
 Troponin is another regulatory protein that binds to tropomyosin to regulate muscle contraction.

Answer: I
 Sarcomere is the basic functional unit of a muscle cell.

Answer: H
 Irritability is the ability of a cell or tissue to respond to a stimulus, such as a nerve impulse.

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

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

Answer: G
 T-tubules are tubular extensions of the sarcolemma that penetrate into the muscle fiber and help to distribute the nerve impulse throughout the muscle cell.

Answer: K
 Motor unit is a motor neuron and all the muscle fibers it innervates.

Match Each Term with Its Corresponding Definition or Description