Question 1

Which of the following best describes the function of the sympathetic division of the autonomic nervous system?

Accepted Answer

It prepares the body for emergencies by increasing heart rate and redirecting blood flow to muscles.

Question 2

A patient suffers a spinal cord injury that damages the white matter but leaves the gray matter mostly intact. Which of the following functions is most likely to be impaired?

Accepted Answer

Transmission of action potentials along myelinated axons.

Question 3

Which type of glial cell is responsible for forming the blood-brain barrier and regulating the chemical environment of the CNS?

Accepted Answer

Astrocytes

Question 4

A person touches a hot stove and immediately withdraws their hand before feeling pain. Which neural pathway and reflex are primarily involved in this response?

Accepted Answer

Converging pathway and withdrawal (flexor) reflex

Question 5

Which of the following best explains why myelinated axons conduct action potentials faster than unmyelinated axons?

Accepted Answer

Action potentials in myelinated axons jump between nodes of Ranvier, a process called saltatory conduction.

Question 6

Which brain region is primarily responsible for relaying sensory information to the cerebral cortex?

Accepted Answer

Thalamus

Question 7

A lesion in the prefrontal area of the cerebral cortex would most likely result in which of the following deficits?

Accepted Answer

Impaired motivation and foresight for planning movements

Question 8

Which of the following correctly matches the neuron type with its function?

Accepted Answer

Pseudo-unipolar neurons: Transmit sensory input to the CNS

Question 9

If the dorsal column pathway of the spinal cord is damaged, which sensory function is most likely to be affected?

Accepted Answer

Fine touch and proprioception

Question 10

Which of the following best describes the flow of cerebrospinal fluid (CSF) in the central nervous system?

Accepted Answer

CSF is produced by the choroid plexus, flows through the ventricles, enters the subarachnoid space, and is reabsorbed into the blood.

Question 11

A patient is unable to perform precise voluntary movements of their right hand. Which neural pathway is most likely damaged?

Accepted Answer

Pyramidal (direct) tract

Question 12

Which of the following is a function of the insula lobe of the cerebrum?

Accepted Answer

Processing taste, visceral sensations, and self-awareness

Question 13

Which glial cell type is responsible for myelinating axons in the peripheral nervous system (PNS)?

Accepted Answer

Schwann cells

Question 14

A person has difficulty with balance and coordination but has no issues with memory or language. Which brain region is most likely affected?

Accepted Answer

Cerebellum

Question 15

Which of the following best describes the function of the enteric nervous system?

Accepted Answer

It manages digestive functions independently of the brain.

Question 16

Which of the following equations best represents the relationship between conduction velocity ($v$), axon diameter ($d$), and myelination in a neuron?

Accepted Answer

$v = k \cdot d$ (where $k$ is a constant, for myelinated axons)

Question 17

A patient is unable to comprehend spoken language but can still produce speech. Which area of the brain is most likely damaged?

Accepted Answer

Wernicke's area

Question 18

Which of the following best describes a converging neural pathway?

Accepted Answer

Many neurons send signals to one neuron.

Question 19

Which of the following is the correct order of structures involved in a typical reflex arc?

Accepted Answer

Receptor, sensory neuron, interneuron, motor neuron, effector

Question 20

Which lobe of the cerebrum is primarily responsible for processing auditory information and memory?

Accepted Answer

Temporal lobe

Organization and Function of the Nervous System: Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards