kidneys.

Question 1

type of substance: water.
how is it lost and can it be controlled?

Answer 1

lungs when you exhale, sweating and urine.
no.

Question 2

type of substance: ions.
how is it lost and can it be controlled?

Answer 2

lungs, skin when sweating, urine.
no.

Question 3

type of substance: urea.
how is it lost and can it be controlled?

Answer 3

excreted in urine, lungs, sweat.
yes.

Question 4

define: ADH.

Answer 4

hormone produced in pituitary gland, controls volume and concentration of urine.

Question 5

define: urea.

Answer 5

nitrogenous waste product result from breakdown of proteins excreted in urine.

Question 6

stages of how the kidney works: stage 1.

Answer 6

blood is transported to the kidneys via the renal artery.

Question 7

stages of how the kidney works: stage 2.

Answer 7

blood is filtered and kidney selectively reabsorbs any useful materials such as glucose, salt ions and water.

Question 8

stages of how the kidney works: stage 3.

Answer 8

blood returns to the circulatory system through the renal vein. waste is urine.

Question 9

stages of how the kidney works: stage 4.

Answer 9

urine is taken from kidneys to the bladder by the ureters.

Question 10

stages of how the kidney works: stage 5.

Answer 10

bladder stores urine until it’s convenient to expel from the body.

Question 11

what is the role of the nephron?

Answer 11

2 processes to clean the blood.
filtering: small molecules.
glucose, water, ions and urea are
filtered out.
selective reabsorption: all glucose, some water and ions.
not urea.