Match each term with its corresponding definition or description.
-protein that joins with calcium ions to allow cross-bridges to form
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

Troponin is a protein that binds with calcium ions and moves tropomyosin to allow cross-bridges to form between actin and myosin.

Answer: A
 Actin is a protein that interacts with myosin to produce muscle contraction.

Answer: C
 Contractility is the ability of muscles to contract and produce force.

Answer: D
 Tropomyosin is a protein that covers the binding sites on actin, preventing myosin from binding unless calcium ions bind to troponin first.

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

Answer: G
 T-tubules are invaginations of the sarcolemma and play a role in excitation-contraction coupling.

Answer: H
 Irritability is the ability of muscle cells to respond to a stimulus, such as a nerve impulse.

Answer: I
 Sarcomeres are the basic contractile units of skeletal muscle.

Answer: K
 A motor unit consists of a motor neuron and the muscle fibers it innervates.

Match Each Term with Its Corresponding Definition or Description