Q: Which equation best represents the breakdown of creatine phosphate to regenerate ATP during muscle contraction?

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

Q: Which of the following is a function of the sarcoplasmic reticulum in skeletal muscle fibers?

Stores and releases calcium ions ($$\text{Ca}^{2+})$$

Question 1

Which of the following best describes the function of the phrenic nerve?

Accepted Answer

It controls the diaphragm and is essential for breathing.

Question 2

A patient presents with loss of sensation and motor function in the right side of the face. Which cranial nerve is most likely damaged?

Accepted Answer

Cranial nerve V (Trigeminal nerve)

Question 3

Which of the following is an example of an inborn reflex?

Accepted Answer

The patellar (knee-jerk) reflex

Question 4

Which receptor type is responsible for detecting changes in muscle length and position?

Accepted Answer

Proprioceptors

Question 5

A muscle fiber is stimulated repeatedly at a frequency that allows partial relaxation between stimuli. What is this phenomenon called?

Accepted Answer

Incomplete tetanus

Question 6

Which equation best represents the breakdown of creatine phosphate to regenerate ATP during muscle contraction?

Accepted Answer

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

Question 7

During muscle contraction, which event occurs immediately after calcium binds to troponin?

Accepted Answer

Tropomyosin shifts, exposing active sites on actin.

Question 8

Which of the following best describes the difference between isotonic and isometric muscle contractions?

Accepted Answer

Isotonic contractions change muscle length while tension remains constant; isometric contractions produce tension without changing muscle length.

Question 9

Which of the following is a function of the sarcoplasmic reticulum in skeletal muscle fibers?

Accepted Answer

Stores and releases calcium ions ($$	ext{Ca}^{2+})$$

Question 10

A muscle fiber is at its optimal length for generating tension. According to the length-tension relationship, what is true about the overlap of thick and thin filaments?

Accepted Answer

There is optimal overlap, allowing maximum cross-bridge formation and tension.

Question 11

Which of the following best describes the role of the agonist (prime mover) in muscle action?

Accepted Answer

It is the main muscle responsible for producing a specific movement.

Question 12

Which class of lever is represented by the action of standing on your toes?

Accepted Answer

Second class

Question 13

Which of the following is a characteristic of slow oxidative (Type I) muscle fibers?

Accepted Answer

They have high myoglobin content and are resistant to fatigue.

Question 14

Which equation best represents aerobic metabolism in muscle cells during prolonged exercise?

Accepted Answer

$$	ext{Glucose} + 6	ext{O}_2 ightarrow 6	ext{CO}_2 + 6	ext{H}_2	ext{O} + 36	ext{ATP}$$

Question 15

Which of the following is a plausible consequence of muscular dystrophy?

Accepted Answer

Progressive muscle weakness and atrophy

Question 16

Which structure in the eye is responsible for refracting light and focusing it onto the retina?

Accepted Answer

Lens

Question 17

Which of the following best describes the process of phototransduction in the retina?

Accepted Answer

Light causes photoreceptors to hyperpolarize, decreasing neurotransmitter release.

Question 18

Which cranial nerve is primarily responsible for transmitting auditory information from the cochlea to the brain?

Accepted Answer

Cranial nerve VIII (Vestibulocochlear nerve)

Question 19

Which of the following best explains why lactic acid accumulates in muscle during intense anaerobic activity?

Accepted Answer

Aerobic metabolism is unable to keep up with ATP demand, so glycolysis produces pyruvate, which is converted to lactate.

Question 20

Which of the following is a plausible cause of vertigo related to the inner ear?

Accepted Answer

Damage to the semicircular canals affecting dynamic equilibrium

Anatomy & Physiology Study Guide: Peripheral Nervous System, Muscle Tissue, Muscular System, and Special Senses

Guida di studio - Domande di pratica

Study guide - Flashcard