Chapter 10 - Homeostasis

Question 1

Compare hydrostatic pressure and osmolarity between Bowman’s capsule and glomerulus

Answer 1

Glomerulus has more pressure, causing fluid to move into nephron

Osmolarity higher in the blood, opposing hydrostatic pressure

HOWEVER,

Hydrostatic P&raquo_space;> Oncontic pressure

**so fluid still moves into nephron

Question 2

What does Secretion mean (in terms of nephron)?

Answer 2

Nephrons can secrete salts, acids, bases, and urea into tubule

it référés to movement of salutes from blood to filtrate anywhere besides Bowman’s capsule

Question 3

What is réabsorption?

Answer 3

Movement of solutes from filtrate to blood

Question 4

What are the major waste products excreted in the urine?

Answer 4

Dump the HUNK

H+

Urea

NH3

K+

Question 5

What happens in the PCT of nephron?

Answer 5

Réabsorption:
- AA, Glucose, water sol vitamins, salts

Secretion: H+, K+, NH3, Urea

Question 6

Which part of the nephron is permeable only to water?

Answer 6

Descending loop of Henle

Question 7

Draw out the nephron with sites of R, S, F, E

Answer 7

Draw it

Question 8

What is countercurrent multiplier system?

Answer 8

Descending loop of H lets water out (diffuses passively into salty medulla)

Ascending Loop actively pumps out ions, making medulla salty