$$E = \frac{RT}{zF} \ln \left( \frac{[\text{ion}]_{\text{outside}}}{[\text{ion}]_{\text{inside}}} \right)$$

Question 1

Which of the following best describes the function of myelination in neurons?

Accepted Answer

It increases the speed of impulse propagation along the axon.

Question 2

Which connective tissue covering surrounds individual nerve fibers within a nerve?

Accepted Answer

Endoneurium

Question 3

A patient presents with loss of conscious behavior and inability to perform voluntary movements. Which part of the brain is most likely affected?

Accepted Answer

Cerebral cortex

Question 4

Which equation correctly represents the Nernst equation for calculating the equilibrium potential of an ion across a membrane?

Accepted Answer

$$E = \frac{RT}{zF} \ln \left( \frac{[	ext{ion}]_{	ext{outside}}}{[	ext{ion}]_{	ext{inside}}} ight)$$

Question 5

Which of the following is NOT a function of the hypothalamus?

Accepted Answer

Coordination of voluntary muscle movement

Question 6

During the propagation of an action potential, which two factors most significantly increase the speed of impulse transmission?

Accepted Answer

Larger axon diameter and increased degree of myelination

Question 7

Which of the following best describes the 'all-or-none principle' of action potentials?

Accepted Answer

An action potential either occurs fully or not at all, regardless of stimulus strength once threshold is reached.

Question 8

Which structure is responsible for producing cerebrospinal fluid in the brain?

Accepted Answer

Choroid plexus

Question 9

A patient has damage to the ventral root of the spinal cord. Which function is most likely impaired?

Accepted Answer

Motor function

Question 10

Which neurotransmitter is primarily involved in the transmission of signals at neuromuscular junctions?

Accepted Answer

Acetylcholine

Question 11

Which of the following best describes the function of the thalamus?

Accepted Answer

Relay station for sensory information to the cerebral cortex

Question 12

Which layer of the meninges is closest to the brain tissue?

Accepted Answer

Pia mater

Question 13

Which of the following correctly matches a sensory receptor type with its stimulus?

Accepted Answer

Photoreceptors – light

Question 14

Which of the following is a correct pathway for sound transmission from the outside of the ear to the brain?

Accepted Answer

External ear → middle ear → inner ear → cochlear nerve → brainstem

Question 15

Which equation best represents the relationship between frequency ($$f$$), wavelength ($$\lambda$$), and speed of sound ($$v) in $$the ear?

Accepted Answer

$$v = f 	imes \lambda$$

Question 16

Which of the following is NOT one of the five basic taste sensations?

Accepted Answer

Spicy

Question 17

Which part of the neuron is primarily responsible for receiving incoming signals?

Accepted Answer

Dendrites

Question 18

Which of the following best explains the refractory period in neurons?

Accepted Answer

It is the time during which a neuron cannot initiate another action potential.

Question 19

Which of the following structures is responsible for maintaining the blood-brain barrier?

Accepted Answer

Endothelial cells of brain capillaries

Question 20

A patient is unable to coordinate voluntary movements and maintain balance. Which brain structure is most likely damaged?

Accepted Answer

Cerebellum

Fundamentals of the Nervous System and Special Senses: Structured Study Notes

Study Guide - Practice Questions