Test 196  (Physiology)
1. The following may cause an elevated blood urea:
a. renal disease

b. steroid therapy

c. dehydration

d. pregnancy

e. tetracycline therapy


2. The following occur in response to a major surgery:

a. increased potassium loss

b. increased protein breakdown

c. increased peripheral glucose uptake

d. sodium and water retention

e. decreased lipogenesis


3. Hyperventilation causes:
a. an alkaline urine

b. a fall in the plasma bicarbonate concentration

c. increased cardiac output

d. increased free serum calcium ions

e. tetany

. 4. Bradycardiac can occur in response to:
a. elevated intraocular pressure

b. ocular massage

c. pulling of the extraocular muscle

d. use of topical atropine

e. intravenous edrophonium (Tensilon test)

5. The following are true about the Troxler's phenomenon:

a. it refers to disappearance of an image during steady 
    fixation of another object

b. it only occurs in the peripheral retina

c. eye movement eliminates this phenomenon

d. movement of the object eliminates this phenomenon

e. the visual acuity is reduced

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