Skin

Question 1

Two types of skin

Answer 1

Thick skin [soles of ur feet]

thin skin [eyelids]

Question 2

5 Functions of your skin?

Answer 2

Protective 
Metabolic
Disease indicator 
Sensory 
Thermoregulatory

Question 3

Components of integumentary system

Answer 3

Skin
Glands
Hair
Nails

Question 4

Layers of skin?

Answer 4

Epidermis
Dermis
Subcutaneous layer

Question 5

Dermis is differentiated into??

Answer 5

Papillary that has fine fibers

And reticular layer that has compact n thick fibers

Question 6

what type of tissue is the Epidermis?

Answer 6

Stratified squamous epithelium

Question 7

4 cell types of epidermis?

Answer 7

Keratinocytes
Langerhans cell
Mwlanocytes
Merkel cells

Question 8

Layers in thin skin type

Answer 8

Stratum:
 corneum
Granulosum
Spinosum
Basale

Question 9

Layers in thick skin type

Answer 9

Stratum:
Corneum 
Granulosum
Spinosum 
Basale
Lucida

Question 10

Explain Keratinocytes?

Answer 10

It produces the fibrous protein called keratin
Waterproofing the skin
Forms the layer called stratum basale
They push their way up to the surface where they become dead cells(with keratin)

Question 11

Explain Melanocytes

Answer 11

Produces the black pigment called melanin
-Stratum basale
They accumulates on the superfacial aspects of keratinocytes shielding its nucleus from Uv light

Question 12

What do u know about Merkel cell?

Answer 12

All about touch
Epidermis of hairless skin
They attach to keratinocytes by desmosomes
Make contact with sensory neuron ending(merkel disc)

Question 13

What do u know about langerhans

Answer 13

They are star shaped
Arise from bone marrow that migrate to epidermis m
Easily damaged by UV light
Epidermal dendritic cells

Question 14

Stratum corneum

Answer 14

Aka 'Horny' layer
Rows of dead cells 
Filled with keratin 
Continuously shred n replaced
Barrier against light,heat &bacteria

Question 15

Stratum granulosum

Answer 15

Nuclei is flattened
Darkly stained-keratohyaline granules
It has lamellated granules-They secret glycolipids into extracellular spaces
To slow water loss in the Epidermis

Question 16

Stratum spinosum

Answer 16

Many sided cells
Known as Prickly spines
They shrink when prepared for slide
Melanin granules langerhan cells predominate

Question 17

Stratum basale

Answer 17

Deepest layer
Single row of cells
Attached to dermis
Contain merkel and melanocytes

Question 18

Subcutaneous layer?

Answer 18

Also known as Hypodermis
Found underneath the dermis
Contains adipose n sweat glands
Responsible for metabolic functions

Question 19

Thick skin

Answer 19

5 layers
Thinner dermis
No hairs 
Many eccrine/merocrine sweat glands
More cells enter stratum corneum

Question 20

Thin

Answer 20

4 layers
Hairs 
Thick dermis 
In the body
Fewer eccrine/merocrine sweat glands
Fewer cells enter stratum corneum

Question 21

Skin colour depends on which 3 things?

Answer 21

Carotene pigments
Amount of blood and oxygen
Amount of melanin

Question 22

Sebum

Answer 22

The oily substance which is secreted by sebaceous glands

Question 23

Difference between eecrine and apocrine?

Answer 23

A
Eecrine is found throughout your life and throughout the body
Apocrine at puberty and is found in genital areas and armpits

B.
eecrine glands open directly into the skins epidermis
The lumen is small
Apocrine release their swear at the root of the hair follicle and lumen is big

Question 24

Similarity between eecrine and Apocrine

Answer 24

Both have myoepithelial cells which contracts and squeeze and discharge secretions

Question 25

The skin function

Answer 25

Develops from epidermis and invades the dermis & Hypodermis
Thermoregulation
Protection

Question 26

Function of Arrector pilli muscle

Answer 26

It is a smooth muscle

It Makes the hair stand up when you are cold,frightened etc

Question 27

Meissner corpuscles receptors ?

Answer 27

Also known as Tactile
They sense light touch
Hairless portion of the skin
They are known as elliptical

Question 28

Pacician corpuscles?

Answer 28

Also known as lamellated
They sense heavy pressure
Found deep in reticular dermis near subcutaneous tissue n joint ligaments
They have oval structures