Questions: 5. Indicate which of the following are among the layers of the dermis. (Check all that apply.) a. papillary layer b. reticular layer c. subcutaneous layer (hypodermis) 6. Identify the main protein that composes a hair. (Circle one.) a. collagen b. elastin c. fibrin d. keratin 7. The subcutaneous layer (hypodermis) is mainly composed of (adipose/dense irregular) connective tissue. 8. Where on the body can thick skin be found? a. abdomen b. forehead c. palms of hand d. top of feet 9. Sweat glands are composed of which type of tissue? (Circle one.) a. connective tissue b. epithelial tissue c. muscle tissue

Let's address the questions one by one:

5. Indicate which of the following are among the layers of the dermis. (Check all that apply.) The answer is:

• a. papillary layer
• b. reticular layer

Explanation:

• a. Papillary layer: This is the upper layer of the dermis, composed of loose connective tissue.
• b. Reticular layer: This is the deeper layer of the dermis, composed of dense irregular connective tissue.
• c. Subcutaneous layer (hypodermis): This is not part of the dermis; it lies below the dermis and is composed mainly of adipose tissue.

6. Identify the main protein that composes a hair. (Circle one.) The answer is: d. keratin

Explanation:

• a. Collagen: This protein is found in connective tissues, providing structural support.
• b. Elastin: This protein provides elasticity to tissues like skin and blood vessels.
• c. Fibrin: This protein is involved in blood clotting.
• d. Keratin: This is the primary protein that makes up hair, nails, and the outer layer of skin.

7. The subcutaneous layer (hypodermis) is mainly composed of (adipose/dense irregular) connective tissue. The answer is: adipose

Explanation: The subcutaneous layer, also known as the hypodermis, is primarily composed of adipose tissue, which stores fat and provides insulation and cushioning for the body.

Summary:

• The layers of the dermis include the papillary layer and the reticular layer.
• The main protein that composes hair is keratin.
• The subcutaneous layer (hypodermis) is mainly composed of adipose connective tissue.