Test 155  (General physiology)
1. Urine volume is increased with:
a. carbonic anhydrase inhibitors

b. hyperglycaemia

c. increased aldosterone secretion

d. damage to the posterior pituitary

e. consumption of alcohol


2. With regard to the transport of carbon dioxide in blood:
a. 25% of carbon dioxide is dissolved in blood

b. carbonic anhydrase is found in plasma

c. 50% of carbon dioxide is carried as bicarbonate

d. deoxygenated haemoglobin facilitates the transport of
    carbon dioxide

e. carbamino compounds are formed from the reaction 
    between carbon dioxide reacts with haemoglobin

3. The following are true about cerebrospinal fluid:
a. it has a greater buffering capacity than plasma

b. it has a similar chloride concentration to plasma

c. it is a plasma ultrafiltrate

d. the rate of formation is dependent on the intraventricular
    pressure over the normal pressure range 

e. its main function is to act as a cushion to protect the 


4. True statements about the pH of the extracellular fluid:
a. in healthy people it is maintained between 7.4 and 7.5

b. is increased in hypovolaemic shock

c. decreases following a cardiac arrest

d. influences the binding of drugs to plasma proteins

e. the lungs and the kidneys play an important in the 
    regulation of plasma pH


5. The following occur in the proximal tubules of the nephron:
a. reabsorption of all glucose

b. reabsorption of most water

c. secretion of bicarbonate

d. active reabsorption of sodium

e. action of aldosterone resulting in sodium reabsorption.

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