Integumentary system

Question 1

Name some of the primary functions of the skin

Answer 1

1. Protection, covering, waterproofing
2. Anti-microbial protection
3. Secretion/absorption
4. Thermoregulation
5. Sensation: pain, pressure, touch, temperature
6. Social/attraction
7. Vitamin D metabolism

Question 2

Name the two histological layers of the skin

Answer 2

Dermis and epidermis

Question 3

What type of epithelial cells are found in the epidermis?

Answer 3

Stratified squamous cells

Question 4

The dermis is made of what type of connective tissue?

Answer 4

Dense, irregular connective tissue

Question 5

What type of structures are found in the dermis?

Answer 5

Blood vessels, nerves, hair follicles, sweat glands, sebaceous glands

Question 6

What is an arrector pili and what is its function?

Answer 6

It’s a tiny muscle that pulls the hair shaft upright when the body is cold or stressed. Its function is to help create an insulating layer of air around the skin.

Question 7

Which embryonic germ layer gives rise to the skin?

Answer 7

The ectoderm

Question 8

What is the function of sebaceous glands and sebum

Answer 8

The sebaceous glands produce a lipid-based substance called sebum. Sebum lubricates the skin and aids in waterproofing.

Question 9

Can the different types of nerve endings/receptors in the skin be related to various types of sensations?

Answer 9

Yes, the skin has nerve endings and sensory receptors in the epidermis and dermis for pain/touch/temperature/pressure.