Integumentary system

Question 1

integumentary system

Answer 1

composed of skin and accessory tissues

Question 2

keratin

Answer 2

type of molecule composing fibrous proteins

Question 3

types of cell junctions

Answer 3

tight junction; adherens junction; desmosomes; hemidesmosomes

Question 4

tight junctions

Answer 4

bring cell membranes close so molecules can’t pass between them

Question 5

adherens junction

Answer 5

adhesive junction; formed by homophilic adhesion molecules

Question 6

desmosome

Answer 6

formed of related proteins encoded by diff genes

Question 7

hemidesmosome

Answer 7

anchors epidermis to dermis

Question 8

keratinocyte

Answer 8

majority of epidermal cells

Question 9

melanocyte

Answer 9

have cell body in basal cell layer- make melanin

Question 10

sebaceous gland cell

Answer 10

secrete sebum onto hair follicles

Question 11

epidermis

Answer 11

keratinised stratified squamous epithelium

Question 12

dermis

Answer 12

layer of dense connective tissue supporting epidermis

Question 13

hypodermis

Answer 13

layer of loose connective tissue containing fat

Question 14

hair follicles

Answer 14

downgrowths of epidermis extending to hypodermis

Question 15

Pacinian corpuscle

Answer 15

fine capsule enclosing lamallae of flattened cells, respond to deep pressure and vibration

Question 16

Meissner’s corpuscle

Answer 16

non myelinated axon associated with Schwann cell stack, sensitivity to light touch

Question 17

squame

Answer 17

dead flattened non nucleated cell

Question 18

merocrine secretion

Answer 18

produces sweat

Question 19

apocrine secretion

Answer 19

produces viscous milky secretion secreted into hair follicle

Question 20

holocrine secretion

Answer 20

secretes sebum

Question 21

cell layers of epidermis (inside to out)

Answer 21

stratum basale; stratum spinosum; stratum granulosum; (stratum lucidum); stratum corneum