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20 Apr 2012
PHGY 210 001 & 002 – Mammalian Physiology 2
1. Which of the following conditions can be a cause of cretinism?
a) Hyperthyroidism during infancy.
b) Hyperparathyroidism during infancy.
c) Production of too much parathyroid hormone because of a parathyroid tumor.
d) Excess dietary iodine during infancy.
e) None of the above statements is correct.
2. Acromegaly arises from
a) production of too much growth hormone during infancy.
b) production of too much growth hormone during adulthood.
c) failure to synthesis testosterone.
d) malnutrition during adulthood.
e) hypothyroidism during infancy.
3. Oxytocin
a) is produced in females only.
b) is related in structure to human chorionic gonadotropin.
c) is a steroid hormone.
d) induces milk ejection from the lactating mammary gland.
e) is released from the anterior pituitary .
4. Which of the following statements is NOT true about estrogen?
a) It is a steroid hormone produced by the gonads.
b) It controls luteinizing hormone release during the menstrual cycle.
c) It is required for maintenance of bone density in females but not in males.
d) It is a regulator of gene transcription.
e) It is required for bone maturation.
5. Which of the following brings mixed venous blood to the alveoli for oxygenation?
a) the pulmonary vein.
b) the pulmonary artery.
c) the bronchial artery.
d) the bronchial vein.
e) the foramen ovale.
6. Airway resistance
a) is decreased in asthma.
b) is defined as a change in volume for a given change in pressure.
c) is lower in the trachea then in the right or left bronchus.
d) is equal to 1/compliance.
e) does not affect airflow.
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7. The pulmonary circulation
a) has lower blood pressure than the systemic circulation.
b) has high vascular resistance.
c) has thick vascular walls.
d) has a pressure drop of approximately 100 mmHg (from pulmonary artery to left atrium).
e) is responsible for supplying the airways with oxygen.
8. Which of the following is true about the cardiovascular system?
a) An endothelial cell layer is found only in the atria and ventricles.
b) The chordae tendinae are made of muscle tissue.
c) The Purkinje fibres in the ventricles are specialized neurons.
d) Arteries and veins are rigid (i.e., inelastic) tubes.
e) A sinus node cell is a myocyte.
9. Which of the following is true about the ventricular action potential?
a) The conduction velocity is slower than that of the atrioventricular nodal action potential.
b) The upstroke phase is less rapid than that of the atrioventricular nodal action potential.
c) There is spontaneous diastolic depolarization.
d) The refractory period is longer than that of a neural action potential.
e) The upstroke phase is generated by the calcium current ICa,L.
10. A patient has the following ECG:
What rhythm is this?
a) normal sinus rhythm.
b) sinus arrhythmia.
c) sinus tachycardia.
d) ventricular tachycardia.
e) 3:1 atrioventricular block.
11. Which of the following statements is true?
a) A typical systemic mean arterial blood pressure is 120 mm Hg.
b) A typical central venous pressure is 20 cm H20.
c) A typical peak right intraventricular pressure is 100 mmHg.
d) For a subject lying flat on her back, the pressure in the superior vena cava is greater than the
pressure in the right atrium.
e) A typical end diastolic volume is about 50 mL.
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12. When one stands, if one does not contract one’s calf muscles, one would expect, with respect to lying
flat on one’s back, to see all of the following changes in the foot:
a) a lower venous pressure.
b) a lower interstitial volume.
c) a lower arteriolar pressure.
d) a lower temperature.
e) unchanged lymph flow.
13. Which of the following statements regarding the function of the kidneys is FALSE?
a) Kidneys regulate water and inorganic ion balance.
b) Kidneys eliminate large proteins into the urine.
c) Kidneys excrete waste products into the urine.
d) Kidneys eliminate foreign chemicals into the urine.
e) Kidneys contribute to the regulation of calcium balance.
14. Which of the following hormones is correctly matched with the tissue of its origin and the site of its
Hormone Tissue of origin Site of action
a) Erythropoietin Bone marrow Kidney
b) 1,25-dihydoxyvitaminD Intestine Skin
c) Renin Stomach Kidney
d) Antidiuretic hormone Kidney Brain
e) Aldosterone Adrenal glands Kidney
15. Which of the following lists the anatomical segments of nephron in the order of the urine flow?
a) Cortical collecting duct!Distal convoluted tubule!Medullary collecting duct.
b) Proximal straight tubule!glomerulus!Descending limb of Henle’s loop.
c) Proximal convoluted tubule!Thick ascending limb of Henle’s loop!Cortical collecting duct.
d) Proximal convoluted tubule!Bowman’s space!Proximal straight tubule.
e) Cortical collecting duct!Thick ascending limb of Henle’s loop!Proximal straight tubule.
16. What is the net glomerular filtration pressure in a normal person, assuming the glomerular capillary
blood pressure of 60 mmHg, plasma oncotic pressure of 30 mmHg, and fluid pressure in Bowman’s
space of 15 mmHg?
a) 90 mmHg
b) 75 mmHg
c) 30 mmHg
d) 15 mmHg
e) None of the above values is correct.
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