Question 1

Which part of the neuron is primarily responsible for initiating the action potential?

Accepted Answer

Axon hillock

Question 2

A patient suffers a spinal cord injury that damages the dorsal roots. Which function is most likely to be impaired?

Accepted Answer

Sensory information transmission to the CNS

Question 3

Which of the following best describes the function of Schwann cells?

Accepted Answer

They form the myelin sheath in the PNS.

Question 4

During saltatory conduction, the action potential 'jumps' between which structures?

Accepted Answer

Nodes of Ranvier

Question 5

Which equation best represents the resting membrane potential of a neuron?

Accepted Answer

$$V_m = -70\ 	ext{mV}$$

Question 6

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

Accepted Answer

Temporal lobe

Question 7

A person is unable to produce speech but can understand language. Which brain region is most likely damaged?

Accepted Answer

Broca's area

Question 8

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

Accepted Answer

Coordinates voluntary movements and balance

Question 9

Which cranial nerve is responsible for the sense of smell?

Accepted Answer

Olfactory nerve (I)

Question 10

Which type of neuron is most commonly found in the CNS and is responsible for connecting sensory and motor pathways?

Accepted Answer

Interneuron

Question 11

Which of the following is a function of the hypothalamus?

Accepted Answer

Regulating body temperature and linking nervous and endocrine systems

Question 12

Which of the following best describes the difference between convergence and divergence in neural pathways?

Accepted Answer

Convergence integrates multiple signals, divergence amplifies a signal.

Question 13

Which nerve plexus is responsible for innervating the diaphragm?

Accepted Answer

Cervical plexus

Question 14

Which of the following is a characteristic of the sympathetic nervous system?

Accepted Answer

Prepares the body for emergencies

Question 15

Which receptor type is responsible for detecting changes in blood pH and CO$$_2$$ levels?

Accepted Answer

Chemoreceptors

Question 16

A patient presents with loss of fine touch sensation but retains crude touch. Which receptor is most likely damaged?

Accepted Answer

Meissner's corpuscles

Question 17

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

Accepted Answer

Relays sensory information to the cerebral cortex

Question 18

Which equation best represents the Nernst equation for calculating equilibrium potential for potassium?

Accepted Answer

$$E_K = \frac{RT}{zF} \ln \left( \frac{[K^+]_{out}}{[K^+]_{in}} \right)$$

Question 19

Which of the following is true regarding the propagation of action potentials in myelinated versus unmyelinated axons?

Accepted Answer

Myelinated axons use saltatory conduction, which is faster than continuous conduction.

Comprehensive Study Notes: Nervous System Structure and Function

Study Guide - Practice Questions