____________________ Research Is Needed If Relatively Little Is Known About

question 5

Short Answer

____________________ research is needed if relatively little is known about the phenomenon to be investigated.

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Definitions:

Norepinephrine

A neurotransmitter and hormone that is involved in response to stress, increases arousal, and alertness, and plays a role in the body's "fight or flight" reaction.

Urogenital Tract

The anatomical system of the urinary and reproductive organs, often considered together due to their close proximity and shared functions in some contexts.

Polarized

Divided into two sharply contrasting groups or sets of opinions or beliefs.

All-Or-Nothing Principle

The principle that once the electrical impulse reaches a certain level of intensity (its threshold), it fires and moves all the way down the axon without losing any intensity.