The Integumentary System

Question 1

Integumentary system (define)

Answer 1

consists of the skin, hair, and nails

protects against the external environment
prevents water loss
thermoregulation
secretes
absorbs

Question 2

Epidermis (locate)

Question 3

keratinocytes (define)

Answer 3

produces keratin which is the main structural component of the skin, hair, and nails.

Question 4

melanocytes (define)

Answer 4

produce melanin which protects the body against UV rays

Question 5

Langerhans cells (define)

Answer 5

a network of cells in the epidermis of the skin that helps regulate the immune system.

Question 6

tactile receptors (define)

Answer 6

neuron in the skin that responds to touch

Question 7

5 epidermal layers- IN ORDER (list and locate)

Answer 7

stratus corneum
stratum lucidum
stratum granulosum
stratum spinosum
stratum basale

Question 8

Which layer of the epidermis does mitosis occur?

Answer 8

basale

Question 9

basement membrane (define and locate)

Answer 9

layer of ECM that attaches all types of epithelia to the connective tissue beneath them

Question 10

dermis (locate)

Question 11

papillary layer of dermis (locate) What is it made of?

Answer 11

areolar connective tissue

Question 12

reticular layer of dermis (locate) What is it made of?

Answer 12

dense irregular connective tissue

Question 13

What are the parts of the nail? (name and locate)

Answer 13

lunula
nail plate
nail root
cuticle
nail bed

Question 14

dermal papillae (locate)

Question 15

eccrine sweat glands (define)

Answer 15

sweat glands that are found all over the body and directly secrete onto the skin to thermoregulate the body’s temperature

Question 16

apocrine sweat glands (define)

Answer 16

sweat glands that function more as scent glands and are found in all of the erogenous regions and become activated around puberty. These secrete into the hair follicle.

Question 17

sebaceous glands (define)

Answer 17

Secretes sebum and oil into the hair follicle to lubricate the skin and hair

Question 18

lamellated corpuscles (define)

Answer 18

sense deep touch and pressure

Question 19

tactile corpuscles (define)

Answer 19

sense light touch and pressure

Question 20

hypodermis (locate)

Question 21

finger printing: dermal ridges, epidermal ridges (locate)

Question 22

hair shaft (locate)

Question 23

hair root (locate)

Question 24

hair bulb (locate)

Question 25

arrector pili muscle (locate)