What Is the Endocrine Gland Labeled with the Arrow

question 64

Multiple Choice

What is the endocrine gland labeled with the arrow?

• A) adrenal
• B) pineal
• C) thymus
• D) testis

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Definitions:

Modafinil

A stimulant medication used to treat sleep disorders such as narcolepsy, promoting wakefulness and alertness.

Suprachiasmatic Nucleus

A region of the brain located in the hypothalamus, responsible for controlling circadian rhythms, including the sleep-wake cycle.

Biological Clock

A mechanism present in organisms that enables them to regulate their bodily rhythms and behaviors in sync with the day-night cycle.

Melatonin

A hormone produced by the pineal gland in the brain, involved in regulating sleep-wake cycles.