Integument

Question 1

functions of integument

Answer 1

protection
sensory
secretion
production
storage
thermoregulation
communication

Question 2

how does the integument provide protection?

Answer 2

external barrier protects underlying structure- physical trauma and invading organisms

Question 3

how does the integument provide sensory?

Answer 3

sensory nerve endings in surface of skin, monitor external environment

Question 4

how does the integument provide secretion?

Answer 4

glands present in skin, produces secretions on surface

Question 5

how does the integument provide production?

Answer 5

vitamin d synthesised in skin

Question 6

how does the integument provide storage?

Answer 6

fat stored in hypodermis, provides energy and insulation

Question 7

how does the integument provide thermoregulation?

Answer 7

mechanisms present to increase and decrease heat loss

Question 8

how does the integument provide communication?

Answer 8

scents/pheromones produced, physical communication

Question 9

what are the 3 layers of skin?

Answer 9

epidermis
dermis
hypodermis

Question 10

define epidermis

Answer 10

superficial layer
stratified squamous epithelium
renewed by stem cells

Question 11

define dermis

Answer 11

underlying layer
dense irregular connective tissue

Question 12

define hypodermis

Answer 12

lies beneath the skin
areolar/adipose tissue

Question 13

name of epidermis cells

Answer 13

keratinocytes
melanocytes
Merkel
Langerhans

Question 14

function of keratinocytes

Answer 14

produces keratin, waterproof protein provides skin with resilience and strength
70-80% of skin cells, produced by ribosomes and packed by Golgi body

Question 15

function of melanocytes

Answer 15

produces a melanin pigment

Question 16

function of Merkel Cells

Answer 16

close to nerve endings, receive touch sensation

Question 17

function of Langerhans Cells

Answer 17

involved in allergic and cell immune related responses

Question 18

Base to Top

Answer 18

stratum Basale (base layer)
stratum spinosum (spiny layer)
stratum granulosum (granular middle layer)
stratum lucidum (clear layer)
stratum corneum (‘horny’ outer layer)

Question 19

what does the dermis contain?

Answer 19

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

Question 20

what are the 2 layers of the dermis?

Answer 20

papillary layer
reticular layer

Question 21

define papillary layer

Answer 21

helps cement epidemris and dermis together, blood vessels, pain, temperature and touch receptors present- areolar tissuede

Question 22

define reticular layer

Answer 22

provides strength and structure to skin, elastin and fibril microfibrils- stretch/glide/recoil

Question 23

what is the hypodermis composed of?

Answer 23

blood and lymphatic vessles/nerves
special touch receptors: pacinian corpuscle and meissner corpuscle