Leak Ion Channels

question 33

Multiple Choice

Leak ion channels:

• A) open in response to changes in the membrane potential
• B) are always open
• C) open in response to neurotransmitters or other chemicals
• D) are closed until opened by specific signals
• E) are responsible for the generation of the action potential in neurons

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Definitions:

Unconditioned Response

A natural, unlearned reaction to an unconditioned stimulus that occurs automatically without previous conditioning.

Conditioned Response

A learned response to a previously neutral stimulus through conditioning.

Unconditioned Response

This is an automatic, natural reaction to a stimulus that occurs without prior learning or conditioning.

Sneezing

An involuntary burst of air through the nose and mouth, usually caused by irritation of the nasal mucosa.