Integument

Question 1

epidermis layers

Answer 1

stratum corneum
stratum lucidum
stratum granulosum
stratum spinosum
stratum basale

Question 2

papillary layer

Answer 2

interdigitates with epidermal pegs

Question 3

reticular layer

Answer 3

composed of dense irregular connective tissue

Question 4

Merkel’s cells

Answer 4

epithelia derivative
act as skin receptors
on basement membrane

Question 5

meissner’s corpuscles

Answer 5

low frequency touch stimuli

Question 6

pacinian corpuscles

Answer 6

respond to pressure and vibration

Question 7

hypodermis

Answer 7

corresponds with superficial fascia

Question 8

keratinocytes

Answer 8

produce keratin to help form water barrier

Question 9

keratin process

Answer 9

1. ribosomes produce keratin and assemble to tonofilaments in the basale
2. tonofilaments bundle to tonofibrils
3. at spinosum the ribosomes synthesize keratohyalin granules with promote tonofibril creation (flaggrin and trichohyalin)
4. lucidum, keratohyalin granules release into cytoplasm
5. combo of keratohyalin granules and tonofibrils make soft epidermis

Question 10

melanocytes

Answer 10

melanosomes formed in basale and released for keratinocytes to uptake. protect from UV

Question 11

Lagerhans Cells

Answer 11

found in spinosum. originate from marrow and act as antigen presenting cells. have indented nucleus

Question 12

hair follicle

Answer 12

follicles are associated with arrestor pili muscles and sebaceous glands

Question 13

sebaceous glands

Answer 13

exocrine gland that have a short duct with several acini . Holocrine secretion

Question 14

eccrine sweat glands

Answer 14

coiled tubular open to skin directly. secrete merocrine like. everywher but lips and genitalia. simple cuboidal and stratified cuboidal

Question 15

appocrine sweat gland

Answer 15

coiled tubular. areola, nipple, perianal region, external genitalia. merocrine