Question 1

Which component of a neuron is primarily responsible for receiving incoming signals from other neurons?

Accepted Answer

Dendrite

Question 2

Which of the following best describes the function of the axon hillock in a neuron?

Accepted Answer

It integrates incoming signals and initiates action potentials.

Question 3

A multipolar neuron is most likely to be found in which part of the nervous system, and what is its primary function?

Accepted Answer

Central nervous system; integration of information

Question 4

Which type of neuroglial cell in the CNS is responsible for forming the myelin sheath around axons?

Accepted Answer

Oligodendrocyte

Question 5

How does the structure of a unipolar neuron support its function in the peripheral nervous system?

Accepted Answer

Its single process allows rapid transmission of sensory information to the CNS.

Question 6

Which CNS neuroglial cell is primarily involved in immune defense and phagocytosis?

Accepted Answer

Microglia

Question 7

Which of the following best explains why Schwann cells are essential for peripheral nerve regeneration?

Accepted Answer

They guide regrowth of axons by forming regeneration tubes.

Question 8

A patient with multiple sclerosis experiences loss of motor function due to demyelination. Which neuroglial cell is most likely affected?

Accepted Answer

Oligodendrocyte

Question 9

Which equation best represents the relationship between the speed of action potential conduction ($$v) $$and the presence of myelin ($$m$$), where $$m = 1 if $$myelin is present and $$m = 0 if $$absent?

Accepted Answer

$$v = v_0$ + k \cdot m$$

Question 10

Which neuroglial cell lines the ventricles of the brain and helps circulate cerebrospinal fluid?

Accepted Answer

Ependymal cell

Question 11

Which of the following best describes the role of astrocytes in the CNS?

Accepted Answer

They maintain the blood-brain barrier and regulate the extracellular environment.

Question 12

Which type of neuron is most likely to be involved in reflex arcs, and why?

Accepted Answer

Unipolar neuron; because it rapidly transmits sensory information to the CNS.

Question 13

Which PNS neuroglial cell surrounds neuron cell bodies in ganglia and regulates the microenvironment?

Accepted Answer

Satellite cell

Question 14

A neuron with one axon and one dendrite extending from opposite sides of the cell body is classified as:

Accepted Answer

Bipolar

Question 15

Which of the following is a key structural feature of oligodendrocytes that supports their function?

Accepted Answer

They have multiple processes that can myelinate several axons at once.

Question 16

Which equation best represents the relationship between the number of dendrites ($$d) $$and the integration capacity ($$I) of a $$neuron?

Accepted Answer

$$I = k \cdot d$$

Question 17

Which scenario best illustrates the function of microglia in the CNS?

Accepted Answer

A glial cell engulfs and digests cellular debris after a brain injury.

Question 18

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

Accepted Answer

Myelin allows saltatory conduction between nodes of Ranvier.

Question 19

Which PNS neuroglial cell is responsible for forming the myelin sheath around peripheral axons?

Accepted Answer

Schwann cell

Question 20

Which of the following best describes the relationship between neuron structure and function in sensory neurons?

Accepted Answer

Their unipolar structure allows for efficient transmission of sensory information to the CNS.

Module 11.2: Nervous System - Neurons and Neuroglial Cells

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