Psych 3 Chapter 2

A graded depolarization is known as an ____.

EPSP

A temporary hyperpolarization is known as an ____.

IPSP

What happens to acetylcholine after it attaches to a receptor on the postsynaptic cell?

It is broken down into two components.

What is the primary difference between temporal summation and spatial summation?

Spatial summation depends on contributions from more than one sensory neuron.

Adrenocorticotropic hormone (ACTH) controls secretions of the ____.

adrenal cortex

You are eating a food containing tryptophan. What can you consume with it to increase its entry to the brain?

carbohydrates

Neuropeptides are synthesized in the ____.

cell body

Many neurons release neuropeptides mostly from the ____.

dendrites

COMTand MAO are ____.

enzymes that convert catecholaminesinto inactive chemicals

The catecholamines include ____.

epinephrine, norepinephrine, and dopamine

Depolarization is to ____ as hyperpolarization is to ____.

excitation; inhibition

A receptor can directly open a channel and thereby exert a(n) ____ effect, or it can produce slower but longer ____ effects.

ionotropic; metabotropic

Which neurotransmitter is released by stimulated neurons to dilate the blood vessels?

nitric oxide

Sherrington studied ____, which are automatic muscular responses to stimuli.

reflexes

What is the proper ordering of a reflex arc?

sensory neuron, interneuron, motor neuron.

A certain weak stimulus produces no reflexive response, but a rapid repetition of that stimulus may produce such a response. What is this phenomenon called?

temporal summation

Temporal summation is to ____ as spatial summation is to ____.

time; location