Physiology MCQs
Tech Books Yard have 51 Physiology for Free Download
The student next to you, realising that there is an examination question on acid base balance, begins nervously hyperventilating and then faints. You make him breathe into a paper bag and he recovers. If you had drawn and analysed his blood when he fainted you would have expected to see
- A. decreased pH, elevated pCO2
- B. decreased pH, decreased pCO2
- C. elevated pH, decreased pCO2
- D. elevated pH, elevated pCO2
- Correct Answer: Option D
Which of the following statements about severe diarrhoea is FALSE?
- A. It causes metabolic acidosis
- B. It results from excessive HCO3 loss from the GI-tract
- C. It leads to inhibition of the peripheral chemoreceptors
- D. It is compensated by HCO3
- Correct Answer: Option D
The ureters:
- A. Propel urine from the uretero-vesical junction towards the renal pelvis
- B. Contain smooth and skeletal muscle in its wall
- C. Propel urine by a process of peristalsis
- D. are located at the end of the urinary tract after the bladder
- Correct Answer: Option C
Micturition
- A. Is brought about by relaxation of the urinary bladder
- B. Is brought about via sympathetic fibres in the hypogastric nerve
- C. Is brought about via sacral parasympathetic fibres
- D. Is measured by the volume of excreted urine
- Correct Answer: Option C
After 24 hrs of lack of drinking fluids, your body response is expected to include the following EXCEPT:
- A. Increased plasma osmolality
- B. Increased blood pressure
- C. Decreased urine volume
- D. Increased thirst stimulus
- Correct Answer: Option B
A rapid loss of one litre of blood
- A. Increases the cardiac output
- B. Is corrected by ADH secretion
- C. Is associated with a rise of plasma renin production
- D. Increases arterial blood pressure.
- Correct Answer: Option C
Which of the following statements about aldosterone is CORRECT?
- A. It is produced by the lungs.
- B. It acts upon the proximal tubules of the nephron.
- C. It increases Na secretion by the kidney
- D. Renin and angiotensin are involved in its control.
- Correct Answer: Option D
Fluid in the proximal tubule lumen from a health kidney
- A. has a [Na ] about twice that of plasma
- B. has a pH of about 5.0
- C. contains significant levels of plasma proteins
- D. remains isotonic throughout
- Correct Answer: Option D
The filtration barrier in glomerular capillaries:
- A. Is impermeable to H
- B. Is regulated by hormones
- C. Allows white blood cells to enter the filtrate
- D. Is determined mainly by podocytes
- Correct Answer: Option D
.Glomerular filtration rate
- A. is about 20 ml/min in healthy adult human kidneys
- B. can be measured by the clearance rate of creatinine
- C. is dependent on the value of arterial blood pressure
- D. is a measure of active secretion from blood to the renal nephrons e) is increased during renal failur
- Correct Answer: Option B