excretion

Question 1

which substances are removed as a waste product during excretion

Answer 1

carbon dioxide, urea, salts.

Question 2

what is the role of kidney

Answer 2

remove the toxic waste product urea from the circulating blood ( carry out excretion)
regulate the water content of the blood

Question 3

renal artery contains _______ urea concentration

Answer 3

high

Question 4

renal vein contains _____ urea concentration

Answer 4

low

Question 5

what does ureter do

Answer 5

carries urine from kidney to bladder

Question 6

difference between urethra and ureter

Answer 6

urethra carries urine from bladder to outside.

ureter carries urine from kidney to bladder

Question 7

what does nephrons do

Answer 7

it filter substances from the blood

Question 8

process in the nephrons

Answer 8

brach of renal artery containing waste, useful molecules, and water is delivered from the circulation

in bowman’s capsule blood is filtered into nephron

at first coiled tubule, most of useful molecules and water is reabsorbed

in the loop of Henle alters salt concentration

in the collecting duct, kidney reabsorb water and return it to the blood.

useful molecules are returned back to the renal vein but waste are transported to as urine

Question 9

what is the artificial kidney called

Answer 9

dialysis

Question 10

problem of kidney transplant

Answer 10

there may be tissue rejection which means the recipient’s immune system will attack the donor kidney. the recipient need to take drugs every time to stop this

Question 11

where is urine stored

Answer 11

bladder

Question 12

what happens if there is damage to the kidney

Answer 12

stop the nephrons working efficiently. the body can no longer control the composition or amount of urine. content of the blood plasma and tissue fluid is not kept at its optimum