Ultrafiltration

Question 1

1st step?

Answer 1

Blood moves into the glomerulus by the afferent arteriole
There is a high hydrostatic pressure in the glomerulus which forces the small molecules out of the blood (in the glomerulus) into the bowman’s capsule

Question 2

2nd step?

Answer 2

The small molecules are water, glucose, urea, amino acids, mineral ions— all forced out of the blood

Question 3

3rd step?

Answer 3

Large proteins remain in the blood

Question 4

4th step?

Answer 4

Small molecules pass through fenestrations in the capillary endothelium

Question 5

5th step?

Answer 5

The small molecules pass over the basement membrane
The basement membrane acts as a sieve/filter

Question 6

6th step?

Answer 6

Podocytes (cells that form the lining of the bowman’s capsule) have gaps as well

Question 7

7th step?

Answer 7

Small substances form the glomerular filtrate in the bowman’s capsule

Question 8

Afferent and efferent arteriole?

Answer 8

Afferent- into glomerulus
Efferent- out
Afferent is thicker
Efferent is thinner

Question 9

What are podocytes?

Answer 9

Cells that form the lining of the basement membrane

Question 10

What is the knot of capillaries in the bowman’s capsule called?

Answer 10

The glomerulus

Question 11

What blood vessel takes blood into the glomerulus?

Answer 11

The afferent arteriole

Question 12

What does the basement membrane act as?

Answer 12

The selective filter- blocking large proteins and blood cells