Biology · Oct / Nov 2022 · Paper 42 · Question 6
0610
As printed in the paper
Show the answer and mark scheme
6(a)(i)[4]
Q – heart / ventricle / cardiac muscle ;
T – renal vein ;
W – vena cava ;
X – pulmonary artery ;
6(a)(ii)[2]
V – septum ;
separates / prevents mixing of, oxygenated and deoxygenated blood ;
6(a)(iii)[1]
blood passes through heart once in a complete circulation (of the body) ;
6(a)(iv)[3]
any three from:
1
efficient / AW, supply of, blood / oxygen / nutrients (to, body / AW) ;
2
efficient / AW, removal of, carbon dioxide / urea / wastes (from body / AW) ;
3
low(er) pressure in, pulmonary, artery / circuit / AW ; 4
to prevents damage to (capillaries in the) lungs ;
5
allows more time for gas exchange ;
6
allows high(er) pressure (in body) ;
7
to allow efficient, filtration in kidneys (for excretion) ; 8
to allow / maintain, a high, metabolic rate / rate of respiration ; 9
AVP ;
6(b)(i)[1]
coronary arteries ;
6(b)(ii)[1]
any one from:
drug treatment: aspirin / AVP ;
surgery: stents / angioplasty / (heart) bypass (operation) ;
6(c)(i)[1]
alveoli / alveolus ;
6(c)(ii)[1]
glomeruli / glomerulus / nephron(s) ;
6(c)(iii)[1]
assimilation ;
6(c)(iv)[1]
deamination ;
6(c)(v)[1]
ovary ;
Make a free account to save your answers and see your weak topics and ask the AI why a wrong answer is wrong.