Question 1

Which of the following best describes the role of creatine phosphate in skeletal muscle contraction?

Accepted Answer

D) It stores energy that will be transferred to ADP to resynthesize ATP

Question 2

Myoglobin is important in muscle tissue because it:

Accepted Answer

C) Stores oxygen in muscle cells

Question 3

Which structure in skeletal muscle cells functions in calcium storage?

Accepted Answer

A) Sarcoplasmic reticulum

Question 4

What is the role of tropomyosin in skeletal muscles?

Accepted Answer

B) Tropomyosin serves as a contraction inhibitor by blocking the myosin binding sites on the actin molecules.

Question 5

During muscle contraction, myosin cross bridges attach to which active sites?

Accepted Answer

B) Actin filaments

Question 6

Which of the following surrounds the individual muscle cell?

Accepted Answer

C) Endomysium

Question 7

What is the primary function of wave summation?

Accepted Answer

A) Produce smooth, continuous muscle contraction

Question 8

When a muscle is unable to respond to stimuli temporarily, it is in which of the following periods?

Accepted Answer

B) Refractory period

Question 9

After nerve stimulation stops, what prevents acetylcholine (ACh) in the synaptic cleft from continuing to stimulate contraction?

Accepted Answer

C) Acetylcholinesterase destroying the ACh

Question 10

Hypothetically, if a muscle were stretched to the point where thick and thin filaments no longer overlapped,

Accepted Answer

A) No muscle tension could be generated

Question 11

Which of the following is NOT a function of astrocytes?

Accepted Answer

D) Provide defense for the CNS

Question 12

Nerve impulses leading to the brain carry information about cool temperatures on the skin. The nerve fibers sending these signals will most likely belong to which division of the nervous system?

Accepted Answer

A) Sensory (afferent) division

Question 13

Which of the following describes the nervous system's integrative function?

Accepted Answer

B) Analyzes sensory information, stores information, makes decisions

Question 14

Which of the following is not a function of the autonomic nervous system?

Accepted Answer

D) Innervation of skeletal muscle

Question 15

Which of the following is false or incorrect?

Accepted Answer

A) A nerve impulse occurs only if the excitatory and inhibitory effects are equal.

Question 16

Immediately after an action potential peaks, which ion channels open to help repolarize the membrane?

Accepted Answer

D) Potassium

Question 17

The period after an initial stimulus when a neuron is not sensitive to another stimulus is the

Accepted Answer

D) Absolute refractory period

Question 18

Ependymal cells are specialized to:

Accepted Answer

D) Circulate cerebrospinal fluid

Question 19

An action potential is regarded as an example of a positive feedback. Which of the following examples best illustrates the positive feedback aspect of an action potential?

Accepted Answer

B) A threshold stimulus will cause the opening of voltage gated sodium ion channels that will cause further depolarizing stimulus. This stimulus will open still more voltage gated sodium ion channels.

Muscle and Nervous Tissue: Structure, Function, and Physiology

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