Excretion Flashcards
1
Q
what is excretion
A
the removal of the waste substances of metabolic reactions and substances in excess of requirements.
2
Q
what are some examples of excretion
A
- CO2 produced in respiration is excreted by the lungs
- urea, excess water and excess iron are excreted by the kidneys
- urea produced in the liver, needs to be excreted because at high temperatures in denatures enzymes
3
Q
draw the renal system
A
vena cava
aorta
right kidney
left kidney
adrenal gland
renal vein
renal artery
ureter
urinary bladder
urethra
4
Q
draw the kidney
A
renal column
medulla
calyx
renal artery
renal vein
pelvis
ureter
cortex
5
Q
what are the roles of the kidney
A
- excretion of toxic waste products
- osmoregulation: maintaining water and salt content of blood and body fats
6
Q
what is osmoregulation
A
maintaining water and salt content of blood and body fats
7
Q
what does a nephron consist of
A
a glomerulus with it’s renal capsule and renal tube
8
Q
what is a glomerulus
A
knots of capillaries
9
Q
describe the process of urine being formed in the glomerulus
A
10
Q
what is a nephron
A
the functional unit of the kidney
11
Q
A
