B4: skin

Question 1

epidermis

Answer 1

uppermost layer (made of five layers) contains keratinocytes, melanocytes, and langherans cells

Question 2

keratinocytes

Answer 2

produce keratin (protein that protects skin from pathogens and injuries)

Question 3

melanocytes

Answer 3

produce melanin (protects skin from UV radiation)

Question 4

langherans cells

Answer 4

type of macrophage that assists in immune system activation

Question 5

dermis

Answer 5

contains sweat glands, hair follicles, and blood vessels, as well as nerve endings (corpuscles)

Question 6

tactile corpuscles

Answer 6

aka Meissner’s corpuscles; mechanoreceptors that respond to light touch

Question 7

bulbous corpuscles

Answer 7

aka Ruffini endings; mechanoreceptors that respond to skin stretching

Question 8

pacinian corpuscles

Answer 8

mechanoreceptors that respond to vibration and pressure

Question 9

hypodermis

Answer 9

bottom layer of the skin. connective tissue between skin, muscles, and bones. contains adipose tissue for fat storage and insulation. also absorbs shock impacts

Question 10

piloerection

Answer 10

aka goosbumps; raising of hairs of skin to trap heat in layer of air around the body