Biology · Oct / Nov 2020 · Paper 41 · Question 3

any one from:

nucleus ;

membrane-bound (named) organelle / has internal membranes ; vesicles ;

no cell wall ;

(cell) membrane ;

controls what, enters / leaves, the cell ;

diffusion (through cell membrane / A) ;

any three from:

breakdown of (excess) amino acids ;

(by) deamination ;

removal of nitrogen containing part (of amino acid) ;

in the liver ;

X marked on either kidney in the outer / edge region ;

letter from function

name of structure

Fig. 3.2 organ that stores urine

bladder

G ; tube that carries urine out of

ureter

F ; the kidney

blood vessel with the lowest

renal vein

D ; concentration of urea

blood vessel with the lowest

concentration of carbon dioxide renal artery

E ; tube that carries urine out of

urethra

H ; the body

any two from:

sweat more / lost more water (while running) ;

do not drink as much / reduced intake of water (while running) ; ref. to homeostasis / negative feedback ;

AVP ;

9(%) ;;;

any three from:

salts are in the blood / move from the blood into the tubule / AW ; ref. to glomerulus ;

(ultra)filters / allows through ;

pores / gaps, in capillary wall / narrow capillaries ;

small molecules are filtered / large are not filtered / AW ;

(some salt) reabsorption ;

ref. to active transport / diffusion ;

excess (salt) remains in the, urine / filtrate ;

AVP ;

any one from:

fibrinogen / fibrin ;

(named) hormone ;

antibodies ;