1. The liver:
a) receives most of its oxygen supply from the portal vein
b) has its highest oxygen tension at the centre of a lobule
c) produces heparin
d) has a normal portal venous pressure of greater than 20 mmHg
e) receives approximately 25% of the cardiac output
2. Skeletal muscle blood flow:
a) increases with noradrenaline
b) receives 50% of the cardiac output at rest
c) may cease during isometric contraction
d) increases with rhythmic contraction
e) increases with adrenaline
3. In thermoregulation:
a) respiratory heat loss is insignificant under normal conditions
b) brown fat is an important source of heat production in neonates
c) shivering is due to impulses conducted via autonomic efferents
d) peripheral vasoconstriction increases heat production
e) sweating is mediated by sympathetic cholinergic neurones
4. Adrenaline:
a) is synthesized by demethylation of noradrenaline
b) increases coronary blood flow
c) increases free fatty acids in the blood
d) mobilizes glycogen stores from the liver
e) is metabolized in the plasma by monoamine oxidase
5. Glucagon:
a) is a positive inotrope
b) is produced by the beta cells of the pancreas
c) stimulates production of free fatty acids in the blood
d) release is increased in starvation
e) stimulates glycogen synthesis
ANSWERS
1.TFTFT
2.FFTTT
3.TTFFT (fundamentals of anaesthesia, 2nd edition page 446)
4.FTTTF
5.TFTTF
ArticleDate:20040713
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