Chapter 5 The Integumentary System

These hormones, which can be released during times of stress, loosen the connections between keratinocytes.

glucocorticoids

All of the following are true of the dermis, except __________.

the hypodermis is part of the dermis

What is the initial response of the skin to being exposed to the ultraviolet rays of sunlight?

Epidermal cells produce cholecalciferol.

According to the textbook, which of the following organs is stimulated by calcitriol

Small intestine

Patterns established by these fibers determine the lines of cleavage

collagen and elastic fibers

What is the composition of the nail body?

dead, tightly compressed epidermal cells packed with keratin

With aging, hair turns gray or white due to which of the following causes?

decreased melanocyte activity

The most populous sweat glands are of which glandular type?

merocrine

In dark-skinned individuals, __________.

the melanosomes are larger