$$\text{Torque} = \text{Force} \times \text{Lever Arm}$$

Question 1

Which of the following best describes the role of ATP in the sliding filament theory of muscle contraction?

Accepted Answer

ATP hydrolysis provides energy for the cocking of the myosin head.

Question 2

Which muscle is primarily responsible for flexion of the forearm at the elbow joint?

Accepted Answer

Biceps brachii

Question 3

A patient presents with difficulty abducting their arm. Which muscle is most likely impaired?

Accepted Answer

Deltoid

Question 4

Which of the following best describes an isometric muscle contraction?

Accepted Answer

The muscle length remains the same while tension increases.

Question 5

During the power stroke of muscle contraction, which event occurs?

Accepted Answer

Myosin head pivots, pulling actin toward the center of the sarcomere.

Question 6

Which structure in the sarcomere is responsible for anchoring the thin filaments?

Accepted Answer

Z disc

Question 7

Which of the following best describes saltatory conduction in neurons?

Accepted Answer

Action potentials jump from one node of Ranvier to the next, increasing conduction speed.

Question 8

Which neurotransmitter is most commonly associated with neuromuscular junctions?

Accepted Answer

Acetylcholine

Question 9

A lesion in the primary auditory cortex would most likely result in which deficit?

Accepted Answer

Impaired hearing perception

Question 10

Which of the following is a function of the hypothalamus?

Accepted Answer

Regulation of body temperature

Question 11

Which muscle group is primarily responsible for knee extension?

Accepted Answer

Quadriceps

Question 12

Which of the following best describes the function of the basal nuclei?

Accepted Answer

Regulation of voluntary motor movements and procedural learning

Question 13

Which of the following is true regarding the meninges of the brain?

Accepted Answer

The arachnoid mater is located between the dura mater and pia mater.

Question 14

Which of the following equations correctly represents the relationship between force, lever arm, and torque in a muscle lever system?

Accepted Answer

$$	ext{Torque} = 	ext{Force} 	imes 	ext{Lever Arm}$$

Question 15

Which of the following best describes the function of the arbor vitae in the cerebellum?

Accepted Answer

It coordinates voluntary movements and balance.

Question 16

Which event occurs immediately after depolarization in a neuron?

Accepted Answer

Repolarization

Question 17

Which of the following is a characteristic of white matter in the brain?

Accepted Answer

Composed primarily of myelinated axons

Question 18

A patient with damage to the spinocerebellar tracts would most likely experience which symptom?

Accepted Answer

Impaired proprioception

Question 19

Which of the following best describes the function of the limbic system?

Accepted Answer

Regulation of emotions and memory

Question 20

Which of the following is the correct sequence of events in muscle contraction?

Accepted Answer

Cocking of myosin head → Binding of myosin to actin → Power stroke → Unbinding of myosin and actin

Comprehensive Study Guide for Muscular and Nervous System (Chapters 9–12)

Study Guide - Practice Questions