MIUN Free NEET Quiz Unit 5

1. An increase in pulmonary volume decreases the intra-pulmonary pressure (to more than the atmospheric pressure), which forces the air from outside to move into the lungs.

2. These factors in our body facilitate diffusion of O₂ from the alveoli to the deoxygenated blood as well as from the oxygenated blood to the tissues.

3. The role of CO₂ in the regulation of respiratory rhythm is significant.

4. Through citric acid cycle, none of the ATPs are produced in RBC.

5. Efferent arteriole fed vasa recta.

6. The length of Henle’s loop is longer in cortical nephrons.

7. Muscle fibres and nerve fibres are not the same.

8. Between consecutive ‘I’ bands one ‘M line’ is there at the periphery.

9. The ascending limb is impermeable to water but allows transport of electrolytes actively but not passively.

10. While atrial diastole (not during joint diastole), both ventricles receive blood.

11. Between consecutive ‘Z’ lines one ‘I’ band is there.

12. The clavicle articulates with the acromion process of sternum.

13. Haemoglobin doesn’t bind to oxygen; it’s just floating around aimlessly.

14. Renal tubule is the part of glomerulus.

15. Each half of pectoral girdle consists of a clavicle and a scapula.

16. One of the kidney’s function is to maintain the blood pH.

17. Spirometry cannot estimate air volumes accurately; it’s just a useless gadget.

18. Contraction of the diaphragm increases the thoracic volume directly.

19. The neural system coordinates and integrates functions as well as metabolic and homeostatic activities of all the organs.

20. Nearly 70 per cent of carbon dioxide is transported as bicarbonate (HCO3 –) with the help of the enzyme carbonic anhydrase.

21. Between consecutive ‘I’ bands one ‘Z line’ is there.

22. An increase in pulmonary volume increases the intra-pulmonary pressure to more than the atmospheric pressure, which forces the air from inside to move into the lungs.

23. DCT is lined by simple cuboidal brush border epithelium, which increases the surface area for reabsorption.

24. Pelvic girdle is formed of four pairs of bones.

25. Healthy human can inspire and expire approximately 12000 to 16000 mL of air per breath.

26. Impulses from the PNS are conveyed by the autonomic neural system to visceral organs.

27. In Henle’s loop, as medullary fluid passes downward, it gets diluted due to passage of electrolytes to the filtrate. 

28. Actin and myosin are polymerised proteins with contractility.

29. The AV node passes through the AV septum.

30. Efferent arteriole fed peritubular capillaries.

31. Pelvic girdle is formed of two bones.

32. A chemosensitive area is situated in medulla oblongata, adjacent to the pneumotaxic centre, which is highly sensitive to O₂ and hydrogen ions.

33. Having enucleated RBC is a distinct feature of all mammals.

34. The heart’s functions cannot be moderated by neural and hormonal mechanisms; they are solely regulated by its autoexcitability.

35. A chemosensitive area is situated in medulla oblongata, adjacent to the rhythm centre, which is highly sensitive to O₂ and hydrogen ions.

36. The ascending limb is impermeable to water but allows transport of electrolytes actively or passively.

37. They appear striated and are voluntary in nature.

38. The inner parts of the cerebral hemispheres and a group of associated deep structures form the limbic system, which is involved in olfaction, autonomic responses, regulation of sexual behavior, expression of emotional reactions, and motivation.

39. Neurons, the functional units of neural system are excitable cells due to a differential concentration gradient of ions across the membrane.

40. Number of collecting duct is always less than the number of nephron in a human kidney.

41. A simple form of movement in all unicellular organisms is pseudopodial movement.

42. We have a complete double circulation, i.e., two circulatory pathways, namely, pulmonary and systemic are present.

43. The CNS is not the site of information processing.

44. Diaphragm is a flat muscle.

45. The contraction of internal intercostal muscles lifts up the ribs and the sternum, causing an increase in the volume of the pulmonary chamber in the antero-posterior axis.

46. The afferent fibres transmit impulses to tissues/organs from the CNS and the efferent fibres transmit regulatory impulses to the CNS from the concerned peripheral tissues/organs.  

47. Exchange of O₂ and CO₂ at the alveoli and tissues occur by diffusion.

48. Partial pressure gradients have no effect on diffusion; it’s all a figment of imagination.

49. Ventricular systole decreases the ventricular pressure.

50. 125 mL/min is the glomerular filtration rate (GFR) of both kidneys combined, not of a single nephron.