BAPSY Biological Basis of Behavior 2

Question 1

Which brain imaging technique measures blood oxygenation levels to infer neural activity?

Accepted Answer

fMRI

Answer

fMRI (functional MRI) uses the BOLD signal, which reflects changes in blood oxygenation, to map brain activity.

Question 2

Myelin sheaths surrounding axons primarily function to:

Accepted Answer

Increase the speed of electrical signal transmission

Answer

Myelin insulates axons and enables saltatory conduction, dramatically increasing the speed of nerve impulse transmission.

Question 3

Which division of the autonomic nervous system is most active during a 'fight-or-flight' response?

Accepted Answer

Sympathetic division

Answer

The sympathetic division activates the fight-or-flight response by increasing heart rate, dilating pupils, and redirecting blood to muscles.

Question 4

The resting membrane potential of a typical neuron is approximately:

Accepted Answer

-70 mV

Answer

A neuron at rest maintains a membrane potential of approximately -70 mV due to differential ion concentrations and selective permeability.

Question 5

Damage to the Broca's area in the left frontal lobe typically results in:

Accepted Answer

Difficulty producing fluent speech

Answer

Broca's area is critical for speech production; damage causes Broca's aphasia, characterized by slow, effortful, non-fluent speech.

BAPSY - Bachelor of Arts in Psychology Practice Test