skin and mucous membranes

Question 1

give the function of skin

Answer 1

protection, thermoregulation, water regulation sensation, absortion, storage and synthesis

Question 2

name the 3 layers of skin

Answer 2

epidermis, dermis and subcutaneous layer

Question 3

which type of epithelial cells are present in the epidermis

Answer 3

stratified squamous

Question 4

name the layers of epidermis starting from the outermost layer and working in

Answer 4

stratum corneum, stratum lucidum, stratum granulosum, stratum spinosum, stratum basale

Question 5

give the name and function of the three types of cell found within the stratum spinosum and stratum basale

Answer 5

. langerhans cells - antigen presenting
. merkel - sensory receptors
. melanocytes - produce melanin

Question 6

describe the dermis of skin

Answer 6

strong flexible connective tissue layer rich in collagen and elasric fibres

Question 7

what does the dermis contain

Answer 7

fibroblasts, macrophages, adipocytes, nerve endings, blood vessels, glands, smooth muscle, lymphatics and hair follicles

Question 8

which cells form collagen

Answer 8

fibroblasts

Question 9

name the two layers of the dermis

Answer 9

papillary (upper) and reticular (lower)

Question 10

give exapmles of clinical skin conditions

Answer 10

pemphigus (autoimmune), vintiligo (loss of melanin), skin cancer, malignant melanomas, acne, psoriasis (autoimmune)

Question 11

what is the mucous membrane

Answer 11

specialised epithelial lining which produces lubrication fluid containing sticky protein mucin which traps microbes and dirt

Question 12

name the 2 layers of the mucous membrane

Answer 12

epithelium amd lamina propria

Question 13

which cells are present in the lamina propria

Answer 13

fibroblasts, immune cells, virtually lacking adipocytes, extracellular matrix

Question 14

which epithelial cells are present in the oral mucosa

Answer 14

stratified squamous