Q: Which equation correctly represents the breakdown of creatine phosphate to regenerate ATP during intense muscle activity?

$$\text{Creatine phosphate} + \text{ADP} \rightarrow \text{Creatine} + \text{ATP}$$

Q: Which of the following equations represents the net ATP yield from anaerobic glycolysis of one molecule of glucose?

$$\text{Glucose} \rightarrow 2 \text{Pyruvate} + 2 \text{ATP}$$

Question 1

Which of the following best describes the role of acetylcholinesterase at the neuromuscular junction?

Accepted Answer

It enzymatically degrades acetylcholine, terminating the signal for muscle contraction.

Question 2

During aerobic cellular respiration in skeletal muscle, how many ATP molecules are produced per molecule of glucose, and where does this process primarily occur?

Accepted Answer

36 ATP; mitochondria

Question 3

A patient is experiencing muscle weakness due to insufficient acetylcholine release at the neuromuscular junction. Which step in the muscle contraction process is most directly affected?

Accepted Answer

Activation of acetylcholine receptors on the muscle fiber membrane

Question 4

Which equation correctly represents the breakdown of creatine phosphate to regenerate ATP during intense muscle activity?

Accepted Answer

$$	ext{Creatine phosphate} + 	ext{ADP} ightarrow 	ext{Creatine} + 	ext{ATP}$$

Question 5

Which of the following best explains why skeletal muscle can have spasms after intense exercise?

Accepted Answer

Short refractory period allows rapid repeated contractions

Question 6

A patient with myasthenia gravis has antibodies that block acetylcholine receptors. What is the most likely effect on muscle contraction?

Accepted Answer

Muscle contraction is impaired because acetylcholine cannot activate the muscle fiber.

Question 7

Which of the following is a correct sequence of events for excitation-contraction coupling in skeletal muscle?

Accepted Answer

Acetylcholine release → Activation of acetylcholine receptors → Sodium influx → Depolarization → Calcium release from sarcoplasmic reticulum

Question 8

Which type of muscle fiber is most likely to be recruited during a marathon, and what is its primary metabolic pathway?

Accepted Answer

Type I; aerobic respiration

Question 9

Which neurotransmitter is primarily responsible for stimulating skeletal muscle contraction at the neuromuscular junction?

Accepted Answer

Acetylcholine

Question 10

A patient is unable to recover quickly after intense exercise. Which physiological process is most likely impaired?

Accepted Answer

Excess Postexercise Oxygen Consumption (EPOC)

Question 11

Which of the following equations represents the net ATP yield from anaerobic glycolysis of one molecule of glucose?

Accepted Answer

$$	ext{Glucose} ightarrow 2 	ext{Pyruvate} + 2 	ext{ATP}$$

Question 12

Which of the following best describes the function of the blood-brain barrier (BBB)?

Accepted Answer

It selectively restricts passage of substances from the blood into the brain.

Question 13

Damage to the left cerebral hemisphere is most likely to result in which of the following deficits?

Accepted Answer

Impaired speech and written language

Question 14

Which structure is responsible for producing cerebrospinal fluid (CSF)?

Accepted Answer

Choroid plexus

Question 15

Which of the following is a function of the hypothalamus?

Accepted Answer

Control of autonomic nervous system and endocrine functions

Question 16

A patient presents with demyelination in the peripheral nervous system (PNS). Which cell type is most likely affected?

Accepted Answer

Schwann cells

Question 17

Which of the following best describes the role of the cerebellum?

Accepted Answer

Coordinating voluntary movements and maintaining balance

Question 18

Which neurotransmitter is thought to be deficient in patients with Parkinson's disease?

Accepted Answer

Dopamine

Question 19

Which of the following best explains the difference between white matter and gray matter in the brain?

Accepted Answer

White matter contains myelinated axons; gray matter contains neuron cell bodies.

Muscle Tissue, Nervous System, and Brain Structure: Study Guide for Anatomy & Physiology

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