Human Biology MCQ Unit 2 1 Which of

Human Biology MCQ Unit 2

1. Which of these events produces the normal sounds of heart beat heard through a stethoscope? A. B. C. D. Contraction of the atria Contraction of the ventricles Closing of the heart valves Opening of the heart valves

2. Which of the following is not a function of the lymphatic system? A. It returns excess tissue fluid to the blood B. It transports fat from the small intestine C. It destroys bacteria D. It causes the clotting of blood at wounds

3. Where is bile active? A. B. C. D. Liver Stomach Gall bladder Small intestine

4. Which of the following pairs of compounds is produced by the pancreas? A. B. C. D. Glycogen and insulin Insulin and ADH Insulin and glucagon Glycogen and glucagon

5. The concentration of urea in plasma is 0. 2 g/100 cm 3, and in urine it is 1. 26 g/100 cm 3. By how many times has the urea been concentrated by the activity of the kidney? A. B. C. D. 0. 252 times 1. 28 times 6. 3 times 63 times

6. Which of the following hormones is released by the pituitary gland? A. B. C. D. Insulin Adrenaline Oestrogen Antidiuretic hormone

7. Infants are more likely to suffer from hypothermia because they have A. B. C. D. A low surface area to volume ratio A high surface area to volume ratio A low metabolic rate A high metabolic rate

8. After a race an athlete breathes at a rate of 24 breaths per minute, with a tidal volume of 1 litre, and 5% CO 2 in his exhaled air. What would be the volume of CO 2 breathed out during the first two minutes after the race? A. 0. 18 litres B. 0. 36 litres C. 1. 2 litres D. 2. 4 litres

9. Which hormone stimulates the production of testosterone by the testes? A. Follicle stimulating hormone (FSH) B. Luteinising hormone (LH) C. Oestrogen D. Progesterone

10. Which hormone is produced by the corpus luteum? A. B. C. D. Follicle stimulating hormone (FSH) Luteinising hormone (LH) Oestrogen Progesterone

11. Which of the following will not normally pass through the placenta between the mother and the fetus? A. B. C. D. Oxygen Minerals Glucose Red blood cells

12. Fertility drugs can be used to: A. B. C. D. Correct hormone imbalances Reduce the p. H of the oviduct Stimulate mitosis in an egg Protect sperm cells in the oviduct

13. If ventricular systole last for 0. 4 sec, and atrial systole lasts for 0. 2 sec, what is the heart rate of the individual? A. B. C. D. 60 bpm 72 bpm 100 bpm 120 bpm

14. In which of these locations are red blood cells destroyed? A. B. C. D. Liver and lymph nodes Liver and spleen Bone marrow and duodenum Spleen and duodenum

15. Which of the following body fluids does not contain digestive enzymes? A. B. C. D. Saliva Gastric juice Pancreatic juice Bile

16. Which of the following would an increase in ADH bring about? A. An increase in the permeability of the kidney tubules to water B. An decrease in the permeability of the kidney tubules to water C. An increase in the permeability of the glomerulus to water D. An decrease in the permeability of the glomerulus to water

17. The function of the interstitial cells in the human testes is to: A. Act as a store for sperm cells B. Produce sperm C. Cause sperm cells to mature D. Produce testosterone

18. Which of the following are exchanged between maternal and fetal blood by diffusion? A. B. C. D. Oxygen and proteins Carbon dioxide and antibodies Oxygen and glucose Carbon dioxide and oxygen

19. A person produces 1. 5 litres of urine in 24 hours. The urine contains 36 g of urea. What is the concentration of urea in the urine? A. 1. 0 g / 100 cm 3 B. 2. 4 g / litre C. 2. 4 g / 100 cm 3 D. 3. 6 g / 100 cm 3

20. The function of the seminal vesicles is to: A. B. C. D. Produce nutrients for sperm Allow sperm to mature Store sperm temporarily Produce testosterone