Question 1

Which of the following best describes the sequence of events in a typical reflex arc?

Accepted Answer

Receptor → Sensory neuron → Integration center → Motor neuron → Effector

Question 2

A patient suffers a traumatic injury that destroys the oligodendrocytes in their central nervous system. Which of the following consequences is most likely?

Accepted Answer

Impaired formation of myelin sheaths in the central nervous system

Question 3

Which of the following structures is responsible for relaying sensory impulses to the correct region of the cerebral cortex for interpretation?

Accepted Answer

Thalamus

Question 4

A person is unable to voluntarily move their right arm after a stroke. Which area of the brain is most likely damaged?

Accepted Answer

Primary motor area of the left cerebral hemisphere

Question 5

Which glial cell is responsible for circulating cerebrospinal fluid (CSF) in the central nervous system?

Accepted Answer

Ependymal cell

Question 6

A patient presents with loss of balance and poor coordination. Which brain structure is most likely affected?

Accepted Answer

Cerebellum

Question 7

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

Accepted Answer

It selectively allows passage of water, glucose, and essential amino acids while blocking toxins and most drugs.

Question 8

Which of the following neuron types is characterized by a single process that splits into peripheral and central processes?

Accepted Answer

Unipolar neuron

Question 9

During a routine checkup, a doctor tests a patient's patellar (knee-jerk) reflex. Which type of reflex is being tested, and what is the effector?

Accepted Answer

Somatic reflex; skeletal muscle

Question 10

Which of the following best explains why damage to the ventral root of a spinal nerve would result in paralysis but not loss of sensation?

Accepted Answer

The ventral root contains only motor fibers.

Question 11

A patient is unable to speak or vocalize properly after a head injury. Which specific area of the brain is most likely damaged?

Accepted Answer

Broca's area

Question 12

Which of the following is the correct order of the meninges from outermost to innermost?

Accepted Answer

Dura mater → arachnoid mater → pia mater

Question 13

Which of the following best describes the function of astrocytes in the central nervous system?

Accepted Answer

They anchor neurons to capillaries and regulate exchange of materials.

Question 14

Which of the following statements about the organization of gray and white matter in the spinal cord is correct?

Accepted Answer

Gray matter is internal and white matter is external.

Question 15

A patient is exposed to a toxin that destroys Schwann cells. Which of the following would most likely result?

Accepted Answer

Loss of myelin in the peripheral nervous system

Question 16

Which of the following best describes the role of the corpus callosum?

Accepted Answer

It connects the two cerebral hemispheres and transmits impulses between them.

Question 17

Which of the following substances can easily cross the blood-brain barrier?

Accepted Answer

Water, glucose, and essential amino acids

Question 18

A patient has a tumor compressing the dorsal root ganglion. Which symptom would you most likely expect?

Accepted Answer

Loss of sensory function

Question 19

Which of the following best describes the function of proprioceptors?

Accepted Answer

They detect stretch or tension in skeletal muscles, tendons, and joints.

Question 20

Which of the following is a correct statement about the autonomic nervous system?

Accepted Answer

It regulates involuntary functions such as heart rate and digestion.

Chapter 7: The Nervous System – Mini-Textbook Study Guide

Guida di studio - Domande di pratica

Study guide - Flashcard