Given Its Role in Either Amplifying or Decreasing the Intensity

question 327

Multiple Choice

Given its role in either amplifying or decreasing the intensity of different types of signal inputs, __________ is the neurotransmitter that may be involved in the process of reinforcement.

• A) serotonin
• B) dopamine
• C) acetylcholine
• D) norepinephrine

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Definitions:

Sphincters

Circular muscles that maintain constriction of a natural body passage or orifice and that relax as required by normal physiological functioning.

Urinary Bladder

A muscular sac in the pelvis that stores urine until it is expelled from the body.

Peritubular Capillary Network

A network of tiny blood vessels that surrounds the tubules in the kidneys, playing a critical role in the process of reabsorption and exchange of substances between blood and the tubular fluid.

Afferent Arteriole

A small artery that leads toward the capillaries of the glomerulus in the kidney, playing a key role in the filtration of blood.