The Thyroid Is an Endocrine Gland That Secretes Three Hormones

question 14

Multiple Choice

The thyroid is an endocrine gland that secretes three hormones, which are

• A) triiodothyronine (T4), thyroxine (T5), and calcitonin.
• B) triiodothyronine (T3), thyroxine (T4), and calcium oxide.
• C) thyroxine (T4), triiodothyronine (T3), and calcitonin.
• D) triiodothyronine (T3), thyroxine (T7), and iron.

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Definitions:

Set-Point Concept

The idea that physiological systems regulate variables at a specific set level, maintaining homeostasis.

Hypothalamus

A small structure beneath the thalamus, involved in the control of eating, drinking, and emotional behavior.

Muscle Tissue

A body tissue composed of fibers that contract to produce movement or maintain posture.

Plump

Having a full, rounded shape; often used to describe a slightly overweight or well-nourished appearance.