Skincare Skin Anatomy and Physiology 2

Question 1

What is the primary function of sebaceous glands?

Accepted Answer

Secrete sebum to lubricate skin and hair

Answer

Sebaceous glands secrete sebum, an oily substance that lubricates and waterproofs the skin and hair.

Question 2

Which structural protein gives skin its elasticity and ability to return to its original shape?

Accepted Answer

Elastin

Answer

Elastin fibers in the dermis provide skin with its elastic properties, allowing it to snap back after stretching.

Question 3

The hypodermis (subcutaneous layer) is primarily composed of which tissue?

Accepted Answer

Adipose (fat) tissue

Answer

The hypodermis is mainly composed of adipose tissue, which insulates the body and cushions organs.

Question 4

What is the approximate time for skin cell turnover (epidermal renewal) in a healthy adult?

Accepted Answer

28–30 days

Answer

In healthy adults, the skin completes a full cell turnover cycle approximately every 28–30 days.

Question 5

Which immune cells in the epidermis help defend against pathogens and play a role in allergic reactions?

Accepted Answer

Langerhans cells

Answer

Langerhans cells are dendritic immune cells in the epidermis that capture antigens and present them to T cells.

Skincare Practice Test