Which of the Following Statements Concerning the Epidermis Is True

question 25

Multiple Choice

Which of the following statements concerning the epidermis is true?

• A)The epidermis contains numerous blood vessels.
• B)The epidermis is very permeable to water-soluble molecules.
• C)The epidermis is nourished by blood vessels located in the dermis.
• D)The most numerous cells in the epidermis are the melanocytes.
• E)The dermis is superficial to the epidermis.

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Definitions:

Suprachiasmatic Nucleus

A region of the brain in the hypothalamus responsible for controlling circadian rhythms.

Pineal Gland

A small endocrine gland in the brain that produces melatonin, a hormone that regulates sleep-wake cycles and seasonal biological rhythms.

Biological Clock

An internal mechanism that regulates bodily rhythms and cycles, such as sleep and wakefulness, over approximately a 24-hour period.

Melatonin

A hormone produced by the pineal gland that regulates sleep-wake cycles, its production increases in darkness to promote sleep.