Skin

Question 1

State functions of the skin.

Answer 1

Regulates body temp.
Stores blood
Protection from environment
Detects stimuli
Excretes & absorbs substances
Synthesises Vit D

Question 2

State the epidermis layers from top to bottom

Answer 2

Stratum corneum
Stratum lucidum
Stratum granulosum
Stratum spinosum
Stratum basale

Question 3

State the layers of the skin

Answer 3

EPIDERMIS
DERMIS
SUBCUTANEOUS

Question 4

EPIDERMIS

Answer 4

Waterproof & physical barrier

Question 5

DERMIS

Answer 5

Blood vessels, nerves & glands.
Collagen.
PAPILLARY: NUTRIENTS & temp. regulation
RETICULAR: strength & elasticity, hair follicles, sweat & sebaceous glands.

Question 6

SUBCUTANEOUS LAYER

Answer 6

BLOOD VESSELS & NERVES

FAT LAYER - INSULATION & CUSHIONING & ENERGY SOURCE.

Question 7

What gives skin its colour

Answer 7

MELANIN

Question 8

STRATUM CORNEUM

Answer 8

Dead skin cells, corneocytes.

Question 9

STRATUM LUCIDIUM

Answer 9

On palms of hands, fingertips & soles of feet.

Question 10

STRATUM GRANULOSUM

Answer 10

Keratin production

Question 11

STRATUM SPINOSUM

Answer 11

KERATINIZATION

Strength & flexibility

Question 12

STRATUM BASALE

Answer 12

KERATINOCYTES formed

Question 13

The main protein component of skin

Answer 13

KERATIN

Question 14

HOLOCRINE GLAND

Answer 14

Secretions accumulate then are released when cell bursts.

CELL DEATH

Question 15

MEROCRINE GLAND

Answer 15

Secretions moved to cell surface in vesicles -> released by EXOCYTOSIS.

Little damage.

Question 16

APOCRINE GLAND

Answer 16

PINCHED OFF portion of apical cell contains secretion.

Little damage.