Components Of Kidney

Question 1

The nephron

Answer 1

The functional unit of the kidney.
Contains blood supply, a glomerulus which functions as individual filtering unit and tubules for secretion and absorption of substances.

Question 2

Blood pathways

Answer 2

Blood leaves the heart - enters abdo aorta - supply’s kidney renal artery divides into branches of arteries = afferent arterials.

Question 3

Afferent arteriole

Answer 3

Carried blood to the glomerulus where it’s filtered. Leaves through efferent arteriole and is returned via venous system.

Question 4

What does the glomerulus consist of?

Answer 4

A group of cells with selective permeability. Known as Semi-permeable membrane

Question 5

What is selective permeability

Answer 5

Certain substances are small enough to cross the membrane whereas bigger blood substances are unable to cross.

Question 6

Afferent & efferent arterioles

Answer 6

Afferent: Larger lumen = blood flows into the glomerulus faster than it flows out.
Creating a pull of blood in the Bowman’s capsule = a hydrostatic pressure.

Question 7

What does Hydrostatic pressure do?

Answer 7

Forces fluid to cross the glomerular membrane and enter the tubules.

Question 8

What is ultrafiltration?

Answer 8

We are hydrostatic pressure forces fluid to cross the glomerular membrane and enter tubules.

Question 9

Collecting duct and Ureter responsibility

Answer 9

Special cells influence: Absorption of essential electrolytes and excretion of waste products.

Question 10

Normal glomerulus filtration rate (GFR)

Answer 10

125ml/min