Question 1

Which type of neuron is primarily found in the spinal ganglion and is responsible for transmitting sensory information such as pain and temperature?

Accepted Answer

Pseudounipolar neuron

Question 2

A patient presents with radiating pain along the lateral aspect of the leg after a herniation of the intervertebral disk. Which anatomical concept explains why the pain is felt in the skin rather than the affected inner organ?

Accepted Answer

Referred pain due to shared spinal segments

Question 3

Which layer of the meninges is directly attached to the surface of the brain and spinal cord?

Accepted Answer

Pia mater

Question 4

Type A pseudounipolar neurons in the spinal ganglion receive signals from which type of receptor?

Accepted Answer

Corpuscular receptors (fine mechanoreception)

Question 5

Which of the following best describes the function of cerebrospinal fluid (CSF) in the brain?

Accepted Answer

It serves as a mechanical protector and cushion for the brain

Question 6

A patient with Parkinson’s disease shows degeneration in which specific area of the brainstem?

Accepted Answer

Substantia nigra

Question 7

Which equation correctly represents the relationship between the number of spinal segments ($n$) and the number of dermatomes ($d$), assuming each segment innervates one dermatome?

Accepted Answer

$d = n$

Question 8

During a lumbar puncture, which space is targeted to collect cerebrospinal fluid?

Accepted Answer

Subarachnoideal space

Question 9

Which of the following is a direct consequence of impaired circulation of cerebrospinal fluid?

Accepted Answer

Hydrocephalus

Question 10

The circle of Willis is formed by the anastomosis of which arteries?

Accepted Answer

Left and right internal carotid arteries and left and right vertebral arteries

Question 11

Which structure separates the left and right halves of the cerebrum?

Accepted Answer

Falx cerebri

Question 12

If a patient suffers a median herniation of the intervertebral disk, which structure is most likely to be compressed?

Accepted Answer

Spinal nerve root

Question 13

Which of the following statements about the dura mater is correct?

Accepted Answer

It consists of an inner and outer layer, with the outer layer continuous with the skull periosteum

Question 14

Which equation best describes the total volume of cerebrospinal fluid ($V_{CSF}$) in the ventricles and subarachnoideal space, given $V_{vent}$ is the volume in the ventricles and $V_{sub}$ is the volume in the subarachnoideal space?

Accepted Answer

$V_{CSF} = V_{vent} + V_{sub}$

Question 15

Which of the following is NOT a function of the spinal cord?

Accepted Answer

Production of cerebrospinal fluid

Question 16

Which of the following best explains why epidural and subdural spaces are only present pathologically in the brain?

Accepted Answer

The dura mater is tightly fused to the skull and arachnoid mater

Question 17

Which of the following is the correct sequence of the three primary brain vesicles during development?

Accepted Answer

Forebrain, midbrain, hindbrain

Question 18

Which cells are responsible for producing cerebrospinal fluid in the ventricles?

Accepted Answer

Ependymal cells of the choroid plexus

Question 19

A patient is unable to perform the patellar reflex. Which part of the spinal cord is most likely affected?

Accepted Answer

Ventral horn

Question 20

Which of the following best describes the difference between type A and type B pseudounipolar neurons in the spinal ganglion?

Accepted Answer

Type A receives signals from fine mechanoreceptors, type B from pain and temperature receptors

Study Notes: Spinal Cord, Spinal Nerves, and Brain Structure (Human Biology/Histology)

Study Guide - Practice Questions

Study Guide - Flashcards