Question 1

Which of the following best describes the difference between local potentials and action potentials in neurons?

Accepted Answer

Local potentials are graded and can summate, while action potentials are all-or-none and propagate without decrement.

Question 2

A patient suffers a stroke that damages the precentral gyrus of the left cerebral hemisphere. Which function is most likely to be impaired?

Accepted Answer

Voluntary motor control on the right side of the body

Question 3

Which of the following best describes the resting membrane potential ($$V_{rest}) of a $$typical neuron?

Accepted Answer

$$V_{rest} = -70\ \mathrm{mV}$$

Question 4

Which brain structure is primarily responsible for coordinating voluntary movements and maintaining posture and balance?

Accepted Answer

Cerebellum

Question 5

Which of the following statements about the blood-brain barrier and cerebrospinal fluid (CSF) is correct?

Accepted Answer

The blood-brain barrier is formed by tight junctions between astrocytes, while CSF is produced by the choroid plexus.

Question 6

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

Accepted Answer

Initiation and regulation of voluntary motor movements

Question 7

A lesion in the medulla oblongata would most likely result in which of the following symptoms?

Accepted Answer

Impaired regulation of heart rate and respiration

Question 8

Which of the following best describes the process of decussation in the nervous system?

Accepted Answer

The crossing of nerve fibers from one side of the central nervous system to the other

Question 9

Which type of neuronal circuit is most likely responsible for rhythmic activities such as breathing?

Accepted Answer

Reverberating circuit

Question 10

Which neurotransmitter is most commonly associated with excitatory synapses in the central nervous system?

Accepted Answer

Glutamate

Question 11

A patient presents with loss of sensation on the right side of the body and imaging reveals a lesion in the left postcentral gyrus. Which concept explains this phenomenon?

Accepted Answer

Decussation of sensory pathways

Question 12

Which of the following best describes the difference between chemical and electrical synapses?

Accepted Answer

Electrical synapses allow direct passage of ions between cells, while chemical synapses use neurotransmitters to transmit signals across a synaptic cleft.

Question 13

Which of the following is the correct order of neurons in an ascending sensory pathway?

Accepted Answer

First-order neuron → Second-order neuron → Third-order neuron

Question 14

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

Accepted Answer

Homeostatic regulation of body temperature, hunger, and endocrine activity

Question 15

Which of the following best describes the location of white matter in the brain and spinal cord?

Accepted Answer

White matter is found deep in the brain and superficial in the spinal cord.

Question 16

Which of the following terms refers to a deep groove in the brain that separates major regions?

Accepted Answer

Fissure

Question 17

Which fiber type connects corresponding areas of the two cerebral hemispheres?

Accepted Answer

Commissural fibers

Question 18

A patient is unable to form new memories after a traumatic brain injury. Which brain structure is most likely damaged?

Accepted Answer

Limbic system

Question 19

Which of the following best describes the function of the reticular formation?

Accepted Answer

Regulation of consciousness and alertness

Question 20

Which of the following best describes the process of temporal summation in neural integration?

Accepted Answer

A single presynaptic neuron fires rapidly in succession to produce a larger postsynaptic potential.

Study Guide: Nervous System Structure and Function

Guida di studio - Domande di pratica

Study guide - Flashcard