Quiz 5

Question 1

Skin functions

Answer 1

thermoregulation, communication, sensation, vitamin d synthesis, resists infection and trauma, barrier to h2o and radiation (uv)

Question 2

What is skin also known as?

Answer 2

integument

Question 3

What does the integumentary system consist of?

Answer 3

the skin and it’s accessory organs such as hair, nails, and glands

Question 4

What is the study of the inegumentary system?

Answer 4

dermatology

Question 5

What is the largest organ in the body?

Answer 5

skin

Question 6

The outer layer of skin

Answer 6

epidermis

Question 7

the deeper layer of skin

Answer 7

dermis

Question 8

What does thick skin cover?

Answer 8

the palms, soles of the feet, and surfaces of the fingers and toes and contains sweat glands

Question 9

Ehat does thin skin cover?

Answer 9

the rest of the body and contains hair follicles and sebaceous glands as well as sweat glands

Question 10

Epidermal cells

Answer 10

are packed with keratin and linked with desmosomes that increase durability and impermeability

Question 11

What is the pH of skin

Answer 11

slightly acidic with a pH of 4-6

Question 12

What does skin form a barrier from?

Answer 12

the skin blocks water moving in either direction, the epidermis blocks uv radiation, the skin is a barrier to some harmful chemicals but is permeable to some drugs and poisons

Question 13

What is Vitamin D synthesis?

Answer 13

vit d is needed for bone development and maintenance

Question 14

What nerve endings does skin have?

Answer 14

heat, cold, touch, texture, pressure, vibration, and tissue injury

Question 15

mucus

Answer 15

noun

Question 16

mucous

Answer 16

adjective

Question 17

hyperplasia

Answer 17

add more cells

Question 18

hypertrophy

Answer 18

make cells biger

Question 19

neoplasia

Answer 19

growth of new mass

Question 20

metaplasia

Answer 20

one tissue becomes another

Question 21

regeneration

Answer 21

replace damaged cells with the same cells

Question 22

fibrosis

Answer 22

replace damaged cells with FCT

Question 23

Where are most sensory receptors?

Answer 23

face, palms, fingers, soles, nipples, and genitals

Question 24

thermoregulation

Answer 24

thermoreceptors in the skin transmit signals to the brain that can lead to vasoconstriction of dermal blood vessels to prevent heat loss or vasodilation to increase it

Question 25

What is the epidermis?

Answer 25

a keratinized stratified squamous epithelium, and like other epithelia, lacks blood vessels and depends on diffusion for nutrients and waste removal

Question 26

What five types of cells is the epidermis composed of?

Answer 26

stem cells, melanocytes, tactile cells, dendritic cells

Question 27

What are stem cells?

Answer 27

undifferentiated cells that divide to give rise to keratinocytes

Question 28

Where are stem cells found?

Answer 28

the deepest layer (stratum basale)

Question 29

What are melanocytes?

Answer 29

occur only in the stratum basale; they synthesize the pigment melanin

Question 30

Whtat are tactile cells

Answer 30

the receptors for the sense of touch; found in the stratum basale, they are associated eith an underlying dermal nerve fiber

Question 31

What are dendritic cells ?

Answer 31

macrophages that migrate from bone marrow, are found in the stratum spinosum and stratum granulosum where they stand guard against foreign pathogens

Question 32

How are the cells of the epidermis arranged?

Answer 32

in four to five strata