Integument, Breast, Senses

Question 1

characteristics of the integument

Answer 1

skin, skin appendages, nails, hair, sweat glands, and sebaceous glands
largest organ of the body
highly regenerative

Question 2

function of the integument

Answer 2

protection against injury, pathogens, and UV radiation
thermoregulation
sensory reception
secretion of lipids, milk, ions, and vitamin D synthesis

Question 3

differences between thin and thick skin

Answer 3

thin is the majority of the skin, able to produce hair and sebaceous oil secreting glands
thick skin is on the palms and soles to protect against friction

Question 4

keratinocytes

Answer 4

main cell of the epidermis and produces keratin, cuboidal

Question 5

melanocytes

Answer 5

produce melanin, skin pigment and hair color

helps protect against UV radiation

Question 6

merkel cells

Answer 6

sensory receptor for light touch

Question 7

langerhan cells

Answer 7

monocyte derived dendritic cells that recognize antigens in the prickly layer

Question 8

contrast apocrine and eccrine sweat glands

Answer 8

apocrine: areola, external genitalia, axilla, and circumanal region, less coiled than eccrine
inner layer of simple cuboidal, large lumen
eccrine: distributed over most of the body, thermoregulation
2 layers of dark cuboidal cells

Question 9

common diseases of the integument

Answer 9

basal cell carcinoma: from basal cells
squamous cell carcinoma: from keratinocytes
melanoma: from melanocytes
inflammatory, blistering, dermatitis, scleroderma, acne vulgaris, fungal nail infections, sebaceous cysts

Question 10

characteristics of mammary glands

Answer 10

highly modified apocrine sweat glands
lobes with ducts lined by cuboidal or columnar epithelium
ducts are surrounded by fibrocollagenous support tissue
a few mast cells, lymphocytes, and macrophages
adipose