Question

1. choose the best answer.

the protein used by the body to form nails, hair, and skin is _____.
a follicle
keratin
connective tissue
melanin

1. choose the best answer.

what kind of cells are found in the subcutaneous layer?
keratin cells
skin cells
nerve cells
fat cells

Explanation:

1. For question 10: A follicle is a structure for hair growth, connective tissue is a broad tissue type, melanin is a pigment for skin/hair color. Keratin is the fibrous protein that forms the structural component of nails, hair, and the outer layer of skin.
2. For question 11: Keratin cells are in the epidermis, skin cells is a broad term, nerve cells are present but not the primary cell type of the subcutaneous layer. The subcutaneous layer (hypodermis) is primarily composed of fat cells (adipocytes) that store fat and provide insulation.

Answer:

1. keratin
2. fat cells