Question 1

Which of the following best describes the main function of the central nervous system (CNS)?

Accepted Answer

To integrate, process, and coordinate sensory data and motor commands.

Question 2

A patient suffers a spinal cord injury that disrupts communication between the brain and the lower limbs. Which division of the nervous system is primarily affected?

Accepted Answer

Peripheral Nervous System

Question 3

Which of the following is a key difference between the somatic and autonomic nervous systems?

Accepted Answer

The somatic nervous system controls voluntary muscle movements, while the autonomic nervous system regulates involuntary functions.

Question 4

Which cranial nerve is primarily responsible for transmitting visual information from the retina to the brain?

Accepted Answer

Optic nerve (Cranial Nerve II)

Question 5

A person is exposed to a stressful situation, resulting in increased heart rate and dilated pupils. Which division of the autonomic nervous system is responsible for these changes?

Accepted Answer

Sympathetic division

Question 6

Which of the following best explains why damage to the occipital lobe can result in loss of vision?

Accepted Answer

The occipital lobe contains the primary visual cortex, which processes visual information.

Question 7

Which of the following scenarios best illustrates the function of the peripheral nervous system (PNS)?

Accepted Answer

A person quickly withdraws their hand after touching a hot stove.

Question 8

Which neurotransmitter is primarily released by postganglionic neurons of the sympathetic nervous system?

Accepted Answer

Norepinephrine

Question 9

A patient presents with loss of taste and inability to move facial muscles on one side. Which cranial nerve is most likely affected?

Accepted Answer

Facial nerve (Cranial Nerve VII)

Question 10

Which of the following best describes the role of the thalamus in sensory processing?

Accepted Answer

It acts as a relay station, directing sensory information to the appropriate areas of the cerebral cortex.

Question 11

Which of the following equations best represents the resting membrane potential of a neuron?

Accepted Answer

$$V_m = \frac{RT}{F} \ln \left( \frac{[K^+]_{out}}{[K^+]_{in}} \right)$$

Question 12

Which of the following is NOT a special sense?

Accepted Answer

Touch

Question 13

A person is unable to detect changes in blood pressure or heart rate. Which branch of the nervous system is most likely impaired?

Accepted Answer

Autonomic Nervous System

Question 14

Which of the following best describes the function of the myelin sheath in neurons?

Accepted Answer

It increases the speed of action potential conduction along the axon.

Question 15

A patient with damage to the vagus nerve (Cranial Nerve X) would most likely experience which of the following symptoms?

Accepted Answer

Difficulty swallowing and irregular heart rate

Question 16

Which of the following best explains why the parasympathetic nervous system is sometimes called the 'rest and digest' system?

Accepted Answer

It promotes activities that conserve energy and increase digestive processes.

Question 17

Which of the following is the correct sequence for the transmission of a nerve impulse across a synapse?

Accepted Answer

Action potential arrives at axon terminal → neurotransmitter released → neurotransmitter binds to receptor → postsynaptic potential generated

Question 18

Which of the following best describes the function of the olfactory receptors?

Accepted Answer

They detect chemical stimuli in the air and send signals to the brain for the sense of smell.

Question 19

A person is exposed to a toxin that blocks acetylcholine receptors at the neuromuscular junction. What is the most likely effect?

Accepted Answer

Paralysis of skeletal muscles

Question 20

Which of the following best explains why damage to the right parietal lobe can result in neglect of the left side of the body?

Accepted Answer

The right parietal lobe processes sensory information from the left side of the body.

Overview of the Nervous System and Its Divisions

Study Guide - Practice Questions

Study Guide - Flashcards