__________ Plays a Critical Role as a Neurotransmitter That Stimulates

question 257

Multiple Choice

__________ plays a critical role as a neurotransmitter that stimulates skeletal muscles to contract.

• A) Acetylcholine
• B) GABA
• C) Dopamine
• D) Endorphin

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Definitions:

Papillary Layer

The upper layer of the dermis in the skin, containing thin collagen and elastin fibers, which provide nutrients to select layers of the epidermis.

Hypodermis

A layer of tissue directly beneath the skin, consisting of fat and connective tissues that insulate and protect the body.

UV Rays

Ultraviolet radiation, a type of energy emitted by the sun that can be harmful to skin.

Melanin Synthesis

The biological process by which the skin, eyes, and hair gain their color, involving the production of the pigment melanin by melanocytes.