1. Human Biology MCQ Unit 2

2. 1.Which of these events produces the normal sounds of heart beat heard through a stethoscope? • Contraction of the atria • Contraction of the ventricles • Closing of the heart valves • Opening of the heart valves

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

4. 3. Where is bile active? • Liver • Stomach • Gall bladder • Small intestine

5. 4. Which of the following pairs of compounds is produced by the pancreas? • Glycogen and insulin • Insulin and ADH • Insulin and glucagon • Glycogen and glucagon

6. 5.The concentration of urea in plasma is 0.2 g/100cm3, and in urine it is 1.26 g/100cm3.By how many times has the urea been concentrated by the activity of the kidney? • 0.252 times • 1.28 times • 6.3 times • 63 times

7. 6. Which of the following hormones is released by the pituitary gland? • Insulin • Adrenaline • Oestrogen • Antidiuretic hormone

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

9. 8. After a race an athlete breathes at a rate of 24 breaths per minute, with a tidal volume of 1litre, and 5% CO2 in his exhaled air. What would be the volume of CO2 breathed out during the first two minutes after the race? • 0.18 litres • 0.36 litres • 1.2 litres • 2.4 litres

10. 9. Which hormone stimulates the production of testosterone by the testes? • Follicle stimulating hormone (FSH) • Luteinising hormone (LH) • Oestrogen • Progesterone

11. 10. Which hormone is produced by the corpus luteum? • Follicle stimulating hormone (FSH) • Luteinising hormone (LH) • Oestrogen • Progesterone - trick question….

12. 11.Which of the following will not normally pass through the placenta between the mother and the fetus? • Oxygen • Minerals • Glucose • Red blood cells

13. 12. Fertility drugs can be used to: • Correct hormone imbalances • Reduce the pH of the oviduct • Stimulate mitosis in an egg • Protect sperm cells in the oviduct

14. 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? • 60 bpm • 72 bpm • 100 bpm • 120 bpm

15. 14. In which of these locations are red blood cells destroyed? • Liver and lymph nodes • Liver and spleen • Bone marrow and duodenum • Spleen and duodenum

16. 15. Which of the following body fluids does not contain digestive enzymes? • Saliva • Gastric juice • Pancreatic juice • Bile

17. 16. Which of the following would an increase in ADH bring about? • An increase in the permeability of the kidney tubules to water • An decrease in the permeability of the kidney tubules to water • An increase in the permeability of the glomerulus to water • An decrease in the permeability of the glomerulus to water

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

19. 18. Which of the following are exchanged between maternal and fetal blood by diffusion? • Oxygen and proteins • Carbon dioxide and antibodies • Oxygen and glucose • Carbon dioxide and oxygen

20. 19. A person produces 1.5 litres of urine in 24 hours. The urine contains 36g of urea. What is the concentration of urea in the urine? • 1.0 g / 100 cm3 • 2.4 g / litre • 2.4 g / 100 cm3 • 3.6 g / 100 cm3

21. 20. The function of the seminal vesicles is to: • Produce nutrients for sperm • Allow sperm to mature • Store sperm temporarily • Produce testosterone