Integumentary System

Question 1

What functions does your skin perform?

Answer 1

1. Protection
2. Synthesizes vitamin D with UV
3. Regulates body heat
4. Prevents unnecessary water loss
5. Sensory reception (nerve endings)

Question 2

Most numerous cell type, this cell produces keratin

Answer 2

Keratinocytes

Question 3

This type of cell produces the pigments which give skin its color:

Answer 3

Melanocytes

Question 4

These cells derive from macrophages, function in immunity:

Answer 4

Langerhan Cells

Question 5

Located in the deepest layer of the epidermis, contribute to the sensation of touch:

Answer 5

stratum basale

Question 6

Also known as stratum germinativum

Answer 6

Stratum basale

Question 7

Stratum immediately superficial to the stratum basale; cells look prickly under the microscope

Answer 7

Stratum spinosum

Question 8

A clear layer that is normally found only in thick layers of palms and soles

Answer 8

Stratum lucidum

Question 9

Uppermost layer consisting of rows of flat, dead cells filled with keratin

Answer 9

Stratum coreum

Question 10

The outer one-fifth of the dermis is known as the _________________ region.

Answer 10

Papillary

Question 11

Papillary region consists of _______________________ connective tissue.

Answer 11

loose connective tissue

Question 12

The remainder of the dermis is known as the __________________ region

Answer 12

reticular region

Question 13

Reticular region is composed of ___________________ connective tissue.

Answer 13

dense connective tissue

Question 14

Skin is strengthened by __________________ fibers in the reticular layer.

Answer 14

collagen

Question 15

Dark skin is due primarily to __________________________.

Answer 15

Melanin

Question 16

Melanocytes are in greatest abundance in the stratum ___________________.

Answer 16

basale

Question 17

Melanin is derived from the amino acid ____________________.

Answer 17

Tyrosine

Question 18

The enzyme that converts the amino acid to melanin is _____________________.

Answer 18

Tyrosinase

Question 19

This enzyme is activated by ____________________ light.

Answer 19

UV

Question 20

What is the main function of hair?

Answer 20

1. Warmth – less in man than other mammals
2. Sense light touch of the skin
3. Protection - scalp

Question 21

Arrange the part of the hair from superficial to deep:
A. shaft B. root C. bulb

Answer 21

A. Shaft
C. Bulb
B. Root

Question 22

The part of the hair follicle where cells undergo mitosis permitting growth of new hair is called ____________________.

Answer 22

matrix

Question 23

In which parts of the body are these glands largest? __________________

Answer 23

Face

Question 24

In which parts of body are sebaceous glands absent? _________________

Answer 24

Palms & soles

Question 25

the more common type of sweat gland ____________________

Answer 25

eccrine

Question 26

gland responsible for sweaty palms _____________________

Answer 26

eccrine

Question 27

associated with foot odor ______________________

Answer 27

eccrine

Question 28

produce most of the sweat in the armpits and pubic areas ___________________

Answer 28

apocrine

Question 29

In a first degree burn, only the superficial layers of _______________ are involved.

Answer 29

epidermis

Question 30

In a second degree burn, the parts of the skin that are injured are ___________________________________.

Answer 30

epidermis & upper dermis

Question 31

Third degree burns are called _________-thickness burns. Such skin appears _______________________. These burns are usually _______________ because nerve endings are destroyed.

Answer 31

Full thickness;
brown black
numb/ painless