Question 1

Which of the following best describes saltatory conduction in neurons?

Accepted Answer

The jumping of action potentials from one node of Ranvier to the next, increasing conduction speed

Question 2

Damage to which lobe of the brain is most likely to impair decision making and emotional responses, as seen in the case of Phineas Gage?

Accepted Answer

Frontal lobe

Question 3

Which structure connects the right and left cerebral hemispheres and allows communication between them?

Accepted Answer

Corpus callosum

Question 4

Which of the following is a function of the hypothalamus?

Accepted Answer

Homeostasis, hormone release, and circadian rhythm regulation

Question 5

A patient with Parkinson’s disease is most likely to have degeneration in which brain region?

Accepted Answer

Substantia nigra

Question 6

Which of the following best explains the role of cerebrospinal fluid (CSF) in the central nervous system?

Accepted Answer

It cushions the brain and spinal cord, provides nutrients, and removes wastes

Question 7

Which brain region is primarily responsible for regulating breathing, heart rate, and blood pressure?

Accepted Answer

Medulla oblongata

Question 8

Which of the following statements about the organization of the human brain is correct?

Accepted Answer

The telencephalon gives rise to the cerebral cortex and basal nuclei

Question 9

Which of the following best describes the function of the basal nuclei?

Accepted Answer

Motor planning and initiation of movement

Question 10

A person is unable to comprehend language but can still produce speech. Which brain area is most likely damaged?

Accepted Answer

Wernicke's area

Question 11

Which of the following best explains the difference between gray matter and white matter in the brain?

Accepted Answer

Gray matter contains neuron cell bodies and dendrites, while white matter contains myelinated axons

Question 12

Which neurotransmitter is primarily produced by the raphe nucleus and is a major target for antidepressant drugs?

Accepted Answer

Serotonin (5HT)

Question 13

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

Accepted Answer

Motor coordination and learning of motor tasks

Question 14

Which of the following is a correct pathway for sensory information from the skin to the somatosensory cortex?

Accepted Answer

Primary sensory neuron → spinal cord → thalamus → somatosensory cortex

Question 15

Which of the following best explains the difference between nociception and pain?

Accepted Answer

Nociception is the sensory detection of harmful stimuli, while pain is the subjective conscious experience

Question 16

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

Accepted Answer

Relay center for most sensory information to the cortex

Question 17

Which of the following statements about the vertebrate visual system is correct?

Accepted Answer

Photoreceptor cells are depolarized in the dark due to high cGMP levels keeping cation channels open

Question 18

Which of the following best explains why humans have acute color vision compared to most other mammals?

Accepted Answer

Humans possess three types of cones, each with a distinct opsin protein

Question 19

Which of the following is a correct statement about the encoding of sensory information in the nervous system?

Accepted Answer

Stimulus intensity is encoded by the frequency of action potentials in sensory neurons

Question 20

Which of the following best describes the function of lateral inhibition in the retina?

Accepted Answer

It enhances contrast at edges by inhibiting neighboring neurons

L_8 Neurons, Synapses, and Sensory Systems: Structure and Function of the Nervous System

Study Guide - Practice Questions