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The Veins & Lungs. Original public domain image from Flickr

50 Questions and Answers on Human Physiology

  1. What is the main function of the circulatory system?
    • Transport.
  2. What is the primary organ of the respiratory system?
    • Lungs.
  3. What is the purpose of the digestive system?
    • Nutrient absorption.
  4. What is the role of red blood cells in the body?
    • Oxygen transport.
  5. What is the name of the body’s master gland?
    • Pituitary.
  6. What is the function of the cerebellum in the brain?
    • Coordination.
  7. What is the purpose of the urinary system?
    • Waste elimination.
  8. What is the primary function of white blood cells?
    • Immune defense.
  9. What is the hormone responsible for regulating blood sugar levels?
    • Insulin.
  10. What is the process by which oxygen is transported in the blood?
    • Oxygenation.
  11. What is the role of the pancreas in digestion?
    • Enzyme production.
  12. What is the purpose of the lymphatic system?
    • Immune response.
  13. What is the main function of the skeletal system?
    • Support.
  14. What is the name of the body’s largest organ?
    • Skin.
  15. What is the function of the adrenal glands?
    • Hormone regulation.
  16. What is the role of platelets in blood?
    • Clotting.
  17. What is the name of the body’s main energy currency?
    • ATP.
  18. What is the function of the medulla oblongata in the brain?
    • Vital functions control.
  19. What is the hormone responsible for regulating water balance in the body?
    • ADH.
  20. What is the purpose of the reproductive system?
    • Reproduction.
  21. What is the name for breaking down food into smaller molecules?
    • Digestion.
  22. What is the function of the hypothalamus in the brain?
    • Homeostasis regulation.
  23. What is the purpose of the alveoli in the lungs?
    • Gas exchange.
  24. What is the hormone responsible for the stress response?
    • Cortisol.
  25. What is the main function of the cardiovascular system?
    • Blood circulation.
  26. What is the purpose of the gallbladder?
    • Bile storage.
  27. What is the role of the thymus gland?
    • Immune system maturation.
  28. What is the hormone responsible for regulating metabolism?
    • Thyroxine.
  29. What is the function of the spleen?
    • Blood filtration.
  30. What is the purpose of the nephrons in the kidneys?
    • Filtration.
  31. What is the hormone responsible for stimulating uterine contractions during childbirth?
    • Oxytocin.
  32. What is the function of the cerebrum in the brain?
    • Consciousness.
  33. What is the name for the process of muscle contraction?
    • Contraction.
  34. What is the purpose of the mucus in the respiratory system?
    • Protection.
  35. What is the hormone responsible for regulating calcium levels in the blood?
    • Parathyroid hormone.
  36. What is the function of the eustachian tube?
    • Pressure equalization.
  37. What is the purpose of the urinary bladder?
    • Urine storage.
  38. What is the hormone responsible for promoting bone growth?
    • Growth hormone.
  39. What is the main function of the liver?
    • Metabolism.
  40. What is the name for the body’s ability to maintain stable internal conditions?
    • Homeostasis.
  41. What is the role of the corpus callosum in the brain?
    • Communication between hemispheres.
  42. What is the purpose of the peristalsis in the digestive system?
    • Food propulsion.
  43. What is the hormone responsible for regulating blood pressure?
    • Aldosterone.
  44. What is the function of the optic nerve?
    • Vision transmission.
  45. What is the name for the process of nerve impulse transmission?
    • Action potential.
  46. What is the purpose of the villi in the small intestine?
    • Nutrient absorption.
  47. What is the hormone responsible for regulating sleep-wake cycles?
    • Melatonin.
  48. What is the role of the corpus luteum in the reproductive system?
    • Progesterone production.
  49. What is the function of the tympanic membrane?
    • Sound transmission.
  50. What is the purpose of the synovial fluid in joints?
    • Lubrication.

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