Biochem

Question 1

renal excretion of sodium is a key mechanism

Answer 1

by which the kidneys regular blood volume

Question 2

DDAVP the synthetic analogue of AVP (ADH) is used to distinguish between

Answer 2

central and nephorogenic insipidus

Question 3

patients with adrenal insufficiency are less able to retain

Answer 3

infused saline (sodium) than normal subjects

Question 4

measurement of ACTH can be used to distinguish

Answer 4

primary and secondary adrenal insufficiency

Question 5

primary hyperthyroidism is diagnosed music earlier than in the past because of

Answer 5

hypercalcaemia and as a result radiological changes like osteitis fibrosa cysticia are rarely seen anymore

Question 6

rehydration is always insinuation early in the management of
why

Answer 6

severe hypercalcaemia

hypercalcaemia interferes with the proximal tubular resabsorption of sodium and so causes loss of sodium nd water - px usually dehydrated

Question 7

once haemolsys and renal failure have been excluded what is the most likely cause of hyperkalaemia

Answer 7

antihypertensives such as spironolocatone

Question 8

findings of gross hyperkalaemia and hypocalcaemia suggest

Answer 8

contamination with potassium EDTA the anticoagulant used the FBC (purple top) bottle