Chapter 35, Problem 1STP

Summary Introduction

Introduction:

The integumentary system is the structure of the organ that surrounds and protects the body. The primary organ of the integumentary system is skin and it comprises of four types of tissue: connective tissue, epithelial tissue, nerve tissue, and muscle tissue. Epithelial tissue protects the body surfaces and provides protection and support to connective tissues. The muscle tissue is involved in the movement of the body. Nerve tissue forms the body's communication network.

Answer to Problem 1STP

Correct answer:

The correct answer is option (D) to waterproof and protect the skin surface.

Explanation of Solution

Explanation/justification for the correct answer:

Option (A) to protect tissue from ultraviolet radiation. There is a pigment called melanin in the inner layer of the epidermis. Melanin absorbs light energy and protects deeper cells from the harmful effects of ultraviolet sunlight. So, the correct answer is option (A).

Explanation for incorrect answer:

Option (B) to provide support for blood vessels. Melanin is a pigment that protects the inside of the skin from harmful ultraviolet radiation. It does not provide support for blood vessels. So, this is an incorrect answer.

Option (C) to stimulate the growth of hair follicles. Hair follicles are hair cells that arise out of the narrow cavities of the dermis. The cells at the base of the hair follicle divide and drive the cells away from the follicle that allows the hair to grow. So, this is an incorrect answer.

Option (D) to waterproof and protect the skin surface. The outer surface of the skin is known as epidermis. The epidermis composed of epithelial cells and is about 10 to 30 cells thick. The outer layers of epidermal cells contain keratin, which protects and waterproofs the cells and tissues under the skin. So, this is an incorrect option.