Chapter 5.1, Problem 4R

A.

Summary Introduction

To name: The two pigments contained in the epidermis.

Introduction: Skin is the chief organ of the integumentary system. It makes up for about 16 percent of the total body weight. It is also the place or region where the body communicates with the external environment. Skin, along with the integumentary system forms the first line of defense against the hostile environment.

C.

Summary Introduction

To determine: The reason why exposure to sunlight or sunlamps darkens the skin.

Introduction: The epidermis is the outermost layer of the skin, while the inner layers being the dermis and hypodermis epidermis includes five layers namely stratum basale, stratum spinosum, stratum granulosum, stratum lucidum and stratum corneum