DAT bio chapter 11.10 integumentary system

Question 1

The integumentary system has 3 layers:

Answer 1

epidermis
dermis
hypodermis

Question 2

role of integumentary system

Answer 2

homeostasis, vitamin D production, and

protection from pathogens.

Question 3

The epidermis is the ____ layer and contains what

Answer 3

top

keratinocytes

Question 4

What does epidermis provide protection from?

Answer 4

dehydration, UV radiation, and

pathogens.

Question 5

Layers of the epidermis from top to bottom

Answer 5

startum cornuem
stratum lucidum
stratum granulosum
stratum spinosum
stratum basale

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Question 6

Stratum cornuem

Answer 6

Corneocytes (dead keratinocytes) form the outer layer

Question 7

Stratum Lucidum

Answer 7

dead keratinocytes that are not fully differentiated into corneocytes ( present in palms and soles

Question 8

stratum granulosum

Answer 8

keratinocytes secrete lamella bodies to form a water barrier

Question 9

stratum spinosum

Answer 9

important for strength (desmosomes) and immunity (langerhans cells)

Question 10

stratum basale

Answer 10

precursor keratinocyte stem cells proliferate here.

Question 11

location of dermis and function

Answer 11

under epidermis and supports the epidermis and cushions against injuries.

Question 12

Dermis contains what 2 layers

Answer 12

papillary dermis (more superficial and thin, high surface area) and
the reticular dermis (deeper and thick, made of
dense irregular connective tissue).

Question 13

What is hair made of?

Answer 13

keratin. generated from hair follicles

Question 14

what makes hair stand up/

Answer 14

erector pili muscles

Question 15

Sudoriferous (Sweat) glands consist of:

Answer 15

1. Eccrine glands (sweat glands)
   located on the entire body surface
   and are important in
   thermoregulation.

2. Apocrine glands are located at
specific sites and secrete into a
hair follicle. They produce earwax
(ceruminous) or milk
(mammary), depending on their
location.

Question 16

Sebaceous glands
location
function

Answer 16

located over the
entire body except at the palms of hands
and soles of feet. They secrete sebum
(oils + wax) into a hair follicle

Question 17

Location of hypodermis

and function

Answer 17

deepest layer and contains
larger nerves and blood vessels. Made of loose
connective tissue and adipose (fat) tissue, its
main function is fat storage.