A Chemical Is Called A(n) ____ When It Flows Through

question 179

Multiple Choice

A chemical is called a(n) ____ when it flows through the blood to targets throughout the body.

• A) hormone
• B) neurotransmitter
• C) neuromodulator
• D) endocrine

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Definitions:

Merkel Cell

A type of skin cell that functions as a mechanoreceptor, involved in the sense of touch and texture.

Ciliary Body

A structure in the eye that produces aqueous humor, contributes to intraocular pressure, and plays a role in changing the shape of the lens to focus light.

Suspensory Ligaments

Suspensory ligaments are fibrous tissues that support organs or parts, notably the lens of the eye, maintaining its position and shape.

Lens

A transparent, biconvex structure in the eye that focuses light rays onto the retina, allowing for clear vision at various distances.