Skin

Question 1

whats the hair shaft

Answer 1

actual part of the hair

Question 2

what is the stratum corneum

Answer 2

top layer of skin, all dead cells keratinized

Question 3

what is the stratum lucidum

Answer 3

2nd highest layer of skin, lost nuclei and cytoplasm, only found in callous, feet, hands

Question 4

what is the stratum granulosum

Answer 4

3rd highest layer of skin, begin to flatten cells

Question 5

what is the stratum spinosum

Answer 5

4 highest layer, biggest, keratin fibers begin to form

Question 6

what is the stratum basale

Answer 6

they go through division, still has blood connected

Question 7

what are melanocytes

Answer 7

cells that provide melanin, the skin pigment for skin, everyone has the same amount of melanocytes

Question 8

what are longhorns cells

Answer 8

cleans the debris from layers

Question 9

what is the hair follicle

Answer 9

produces hair, hair root is below the epidermis and hair shaft is above, fully keratinized and dehydrated dead cells

Question 10

what are chemoreceptors

Answer 10

responds to changes in the concentration of chemicals-smells and taste

Question 11

what are pain receptors(nociceptors)

Answer 11

responds to tissue damage-mechanical, thermal, chemical, electrical

Question 12

what are thermoreceptors

Answer 12

responds to temperature changes

Question 13

what are mechanoreceptors

Answer 13

sense mechanical forces by detecting changes that deform receptors(skin responding to physical contact, ear providing balance and vibrations from sounds)

Question 14

what are proprioceptors

Answer 14

sense changes in the tension of muscles and tendons

Question 15

what are baroreceptors

Answer 15

detect blood pressure changes

Question 16

what are stretch receptors

Answer 16

dense degree of inflation in lungs

Question 17

what are photoreceptors

Answer 17

responds to light in the eyes

Question 18

what are free nerve endings

Answer 18

simplest receptors, responsible for the sensation of itching

Question 19

what are Tactile(Meissner’s) corpuscles

Answer 19

provide fine touch

Question 20

what are Lamellated(Pacinian) corpuscles

Answer 20

common in deep dermal tissues, detects vibrations in tissue

Question 21

what is keratinization

Answer 21

process by which cells form fibrils of keratin and harden

Question 22

what is melanoma

Answer 22

a tumor of melanin-forming cells, especially a malignant tumor associated with skin cancer

Question 23

characteristics of basal cell carcinoma

Answer 23

appears as a pearly white, dome shaped prominence in the epidermis

Question 24

characteristics of squamous cell carcinoma

Answer 24

firm, smooth, or hyperkeratotic plaque, often with central ulcerations in the epidermis

Question 25

characteristics of malignant melanoma

Answer 25

arise in melanocytes, considered most serious of skin cancer

Question 26

characteristics of hypodermis(subcutaneous layer)

Answer 26

loose connective tissue and Adipose tissue, insulates

Question 27

what is the nail

Answer 27

protective covering on the ends of fingers and toes

Question 28

what is the nail bed

Answer 28

made of specialized epithelial cells that become nail plate

Question 29

what is the lunula

Answer 29

most active growing region

Question 30

what is the nail plate

Answer 30

keratinized epithelial cells

Question 31

what is the rule of nines

Answer 31

subdividing skin surface into regions, each accounting 9%(or some multiple of nines) of total surface area