$$AP = \begin{cases} 1, & \text{if threshold reached} \\ 0, & \text{if threshold not reached} \end{cases}$$

Question 1

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

Accepted Answer

Dendrites

Question 2

What is the main function of the myelin sheath in neural communication?

Accepted Answer

To insulate the axon and speed up neural impulses

Question 3

Which neurotransmitter is most closely associated with mood regulation, and what might occur if its levels are too low?

Accepted Answer

Serotonin; increased risk of depression

Question 4

Which equation best represents the 'all-or-none' principle of action potentials?

Accepted Answer

$$AP = \begin{cases} 1, & 	ext{if threshold reached} \ 0, & 	ext{if threshold not reached} \end{cases}$$

Question 5

Which nervous system division is responsible for the 'fight or flight' response?

Accepted Answer

Sympathetic Nervous System

Question 6

A patient has difficulty moving their right arm after a stroke. Which brain region is most likely affected?

Accepted Answer

Left motor cortex

Question 7

Which structure connects the two hemispheres of the brain and allows for communication between them?

Accepted Answer

Corpus callosum

Question 8

Which of the following best describes the function of the limbic system?

Accepted Answer

Processing emotions and memory

Question 9

A person is unable to recognize faces but can identify objects. Which lobe of the brain is most likely damaged?

Accepted Answer

Temporal lobe

Question 10

Which sleep stage is characterized by rapid eye movement and vivid dreams, and why is it sometimes called 'paradoxical sleep'?

Accepted Answer

REM sleep; because the brain is highly active while the body is immobile

Question 11

Which of the following best explains the difference between sensation and perception?

Accepted Answer

Sensation is the detection of physical energy, while perception is the interpretation of that energy

Question 12

Which formula represents the calculation of the absolute threshold in psychophysics?

Accepted Answer

$$T_{abs} = S_{min}$$

Question 13

Which Gestalt principle explains why we tend to group objects that are close together?

Accepted Answer

Proximity

Question 14

Retinal disparity is a binocular cue for depth perception. What does it refer to?

Accepted Answer

The slight difference in images between the left and right eyes

Question 15

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

Accepted Answer

Coordinating voluntary muscle movement

Question 16

Which process describes the reuptake of neurotransmitters?

Accepted Answer

Neurotransmitters are absorbed back into the presynaptic neuron

Question 17

Which of the following best describes selective attention?

Accepted Answer

Focusing on one stimulus while ignoring others

Question 18

Which structure in the eye is responsible for controlling the amount of light that enters?

Accepted Answer

Pupil

Question 19

Which of the following is an example of top-down processing in perception?

Accepted Answer

Recognizing a familiar face in a crowd

Question 20

Which brain imaging technique uses magnetic fields and radio waves to produce detailed images of the brain's structure?

Accepted Answer

Magnetic Resonance Imaging (MRI)

Biological Bases of Behavior, Sensation, and Perception: Study Guide

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