L4 - Sweat and Skin glands

Question 1

Glands

Answer 1

Sebaceous
Ceruminous
Sudoriferous

Question 2

Types of sudoriferous glands

Answer 2

Apocrine
Eccrine

Question 3

Sebaceous gland

Answer 3

• Connected to hair follicle
• Secrete sebum to lubricate hair, prevent drying out skin
• More active during puberty

Question 4

Ceruminous gland

Answer 4

• Modified sweat gland
• in external ear canal
• opens onto skin surface
• ceruminous gland + sebaceous gland secretion = ear wax

Question 5

Apocrine gland

Answer 5

Large swear gland
open into hair follicle
viscous sweat
metabolised by bacteria&raquo_space; odour
NOT thermoregulation (related to emotions or sexual activity)

Question 6

Eccrine gland

Answer 6

Sweat gland
Forehead, palms, soles
Thermoregulation
Insensible approx 600mL/day
Sensible approx 2L/hr

Question 7

Label

Answer 7

Question 8

What happens in the secretory portion of a sweat gland?

Answer 8

1. Transport of Na+ and Cl- into secretory portion
2. Forms NaCl
3. Transport of water into secretory portion (osmosis)

Question 9

What happens in the absorbing duct component of a sweat gland?

Answer 9

1. NaCl and water flow up duct
2. Na and Cl diffuse back out
3. Water and some NaCl excreted as sweat

Question 10

What happens sweat glands during exercise?

Answer 10

• Sympathetic nerve stimulation increases Na, Cl and water into secretory portion
• Increased flow of sweat up the duct
• Body’s capacity to absorb Cl and Na back in is too low
• More water and NaCl excreted in sweat

Question 11

Cystic fibrosis

Answer 11

Mutant Cl ion channel
Cl isn’t absorbed back in
Na is absorbed
More salt excreted in sweat