integumentary System

Question 1

Integumentary System is formed by skin and has two main tissue layers. What are they?

Answer 1

Epidermis - stratified squamous epithelium

Dermis - areolar and dense irregular connective tissue.

Question 2

One function of the integumentary system is to regulate body temperature. What are the other 6?

Answer 2

Protection
Sensation
Excretion
Vit D synthesis
metabolism
Acts a blood reservoir.

Question 3

The epidermis is a stratified squamous epithelium. Is it avascular or vascular and why?

Answer 3

The epidermis is avascular has it doens’t have its own blood supply. It receives all its nutrients from the dermis.
You have a complete new epidermis every 25-45 days.

Question 4

Langerhann Cells are one of four found in the epidermis. What are the other 3?

Answer 4

Keratinocytes
Melanocytes
Merkel cells

Question 5

What cell makes melanin pigament, which helps determine skin and hair colour?

Answer 5

Melanocytes.

Question 6

True or false. Keratinocytes makes keratin which is a tough and fibrous protein.

Answer 6

True.

Question 7

What cell is an extension of keratinocyte and its function is to ingest foreign substances and activate the immune system?

Answer 7

Langerhann’s Cells or Epidermal dendritic cells.

Question 8

Where is the thinnest layer of skin found on the human body?

Answer 8

Eyelids and genitals.

Question 9

Places the layers of epidermis in order, starting from the most inside layer.

Answer 9

Stratum basale
Stratum spinosum
Stratum granulosum
Stratum lucidum
Stratum corneum

Question 10

What happens to the cells as they move up and away from the dermal blood supply?

Answer 10

They will flatten, accumulate keratin and die. This usually occurs in the stratum granulosum layer.

Question 11

At what layer of the epidermis does rapid mitosis occur?

Answer 11

Stratum basale

Question 12

What layer of the epidermis has keratinocytes, langerhanns and melanocytes in it?

Answer 12

Stratum Spinosum - prickly layer.

Question 13

What is the deepest layer of the epidermis?

Answer 13

Stratum corneum - 3/4 of epidermis which has about 20-30 cells thick and its function is to protect the deeper layers from water loss, abraison and the external environment.

Question 14

The dermis is the layer under the epidermis and it has two layers of connective tissue. What are they?

Answer 14

Papillary layer - first layer under epidermis.

Reticullar layer - under the papillary layer.

Question 15

What layer of the dermis forms the fingerprints on your hands?

Answer 15

The papillary layer.

Question 16

There are two main types of sudoriferous glands, or sweat glands in the body. What are they?

Answer 16

Eccrine and Apocrine

Question 17

Eccrine glands are found on the palms, or soles of your feet. What is there main function?

Answer 17

Thermoregulation of the body, prevents overheating and is made up of 99% water, the rest is urea, antibodoes, vit C, salt.

Question 18

Where would you find apocrine sweat glands?

Answer 18

In the axillary and anogential regions in the hair follicles.

Question 19

What sweat gland begins functioning at puberty under the influence of androgens?

Answer 19

Aprocrine Glands.

Question 20

There are two specialised sweat glands. What are they?

Answer 20

Ceruminous & mammary Glands

Question 21

Ceruminous glands are located in the lining of the external ear canal. What is the function of these?

Answer 21

Produces cerumen (ear wax) and helps deter insects, block entry of foreign objects.

Question 22

Sebaceous glands produces a substance called sebum. Where are these glands located and what do they secrete into?

Answer 22

These are located all over the body (not on your palms or soles of your feet) and secret subum into hair follicles.