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You are in Home >> Exams >> Primary FRCA >> Primary MCQ 1

Physiology MCQ Bank 8

Created: 13/7/2004

 

16. In a normal resting subject, a bradycardia would be expected following:

a) an increase in carotid sinus pressure
b) an increase in right atrial pressure
c) application of pressure to the eyeball
d) the release of a Valsalva manoevre
e) inspiration

17. The velocity of conduction of a nerve action potential:

a) is inversely related to the cross-sectional area of the axon
b) is faster in a myelinated fibre than in an unmyelinated one
c) is decreased by cooling the nerve
d) can exceed 100 m/s in humans
e) is highest in pre-ganglionic autonomic fibres

18. The placenta:

a) transports glucose from maternal to foetal blood by facilitated diffusion
b) can synthesize glycogen
c) actively transports oxygen from maternal to foetal blood
d) allows protein molecules to pass from maternal to foetal blood by pinocytosis
e) secretes oestradiol

19. Oxytocin:

a) stimulates production of milk
b) stimulates ejection of milk
c) release is stimulated by dilatation of the cervix
d) is synthesized in the anterior pituitary
e) produces more powerful uterine contraction in the presence of progesterone

20. Aldosterone:

a) production increases with a fall in plasma osmolality
b) production decreases with a fall in blood volume
c) production decreases with a rise in plasma renin level
d) increases urinary potassium excretion
e) may be produced by tumours of the adrenal cortex
 

ANSWERS

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20.FFFTT


ArticleDate:20040713
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