McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Biology .
Chapters
| 101. |
Lymph flow is: |
| A. | an average 500ml/hr into the circulation |
| B. | proportional to interstitial fluid pressure |
| C. | increased with decreased interstitial fluid protein |
| D. | decreased with contraction of muscles |
| E. | decreased with elevated capillary pressure |
| Answer» B. proportional to interstitial fluid pressure | |
| 102. |
Regarding the intracellular fluid, which is NOT CORRECT? |
| A. | it accounts for 40% of body weight |
| B. | its volume can be estimated using radio-active inulin |
| C. | it contains more protein (in mg/L water) than extracellular fluid |
| D. | the composition of intracellular fluid varies with the nature and function of the cell |
| E. | all of the above are true |
| Answer» B. its volume can be estimated using radio-active inulin | |
| 103. |
Regarding extracellular volume maintenance: |
| A. | control of sodium balance is the major mechanism maintaining ECF volume |
| B. | a rise in ECF volume stimulates vasopressin secretion |
| C. | osmotic stimuli over-ride volume stimuli in the regulation of vasopressin secretion |
| D. | vasopressin causes Na+ retention by the kidney |
| E. | angiotensin II inhibits aldosterone secretion |
| Answer» A. control of sodium balance is the major mechanism maintaining ECF volume | |
| 104. |
Regarding renal compensation in respiratory acidosis and alkalosis: |
| A. | the rate of HCO3 reabsorption is inversely proportional to the arterial PCO2 |
| B. | in respiratory acidosis, HCO3 reabsorption is reduced |
| C. | changes in plasma chloride concentration are proportional to CHO3 concentration |
| D. | in respiratory alkalosis, renal H+ secretion is increased |
| E. | HCO3 reabsorption depends upon the rate of H+ secretion by the renal tubular cells |
| Answer» E. HCO3 reabsorption depends upon the rate of H+ secretion by the renal tubular cells | |
| 105. |
Regarding calcium metabolism: |
| A. | approximately 60% of filtered calcium is reabsorbed by the kidney |
| B. | absorption of calcium in the gastrointestinal tract is mainly by passive diffusion |
| C. | the extent of Ca++ binding by plasma proteins is inversely proportionate to the plasma protein level |
| D. | levels of 1,25-dihydroxycholecalciferol fall in the presence of increased plasma Ca++ |
| E. | the majority of calcium present in bone is readily exchangeable |
| Answer» D. levels of 1,25-dihydroxycholecalciferol fall in the presence of increased plasma Ca++ | |
| 106. |
Toxins that increase the cyclic AMP content of the intestinal mucosa cause diarrhoea because they: |
| A. | increase Cl- secretion into the intestinal lumen |
| B. | increase Na+ absorption in the small intestine |
| C. | increase K+ secretion into the colon |
| D. | increase Na+/K+ co-transport K+ secretion into the colon |
| E. | none of the above |
| Answer» A. increase Cl- secretion into the intestinal lumen | |
| 107. |
Which of the following is NOT synthesised in post-ganglionic sympathetic neurons: |
| A. | L-dopa |
| B. | dopamine |
| C. | noradrenaline |
| D. | adrenaline |
| E. | acetylcholine |
| Answer» C. noradrenaline | |
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