Biology Homeostasis Online Mcqs Test

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Question 1

1. Which of the following substances is actively secreted into the nephron?

Answer

Hydrogen ions

Question 2

2. What is the function of glomerular capillaries?

Answer

Store waste

Answer

Secrete hormones

Answer

Perform filtration

Answer

Reabsorb nutrients

Question 3

3. Which component is most abundant in normal urine?

Answer

Red blood cells

Question 4

4. Which condition is caused by accumulation of urea in the blood?

Answer

Hypertension

Answer

Hyperglycemia

Question 5

5. What leads to the formation of kidney stones?

Answer

High vitamin D

Answer

Dehydration

Answer

Cold temperature

Answer

Acid reflux

Question 6

6. Which of the following increases the risk of kidney stones?

Answer

Low salt diet

Answer

Dehydration and high protein intake

Answer

Excess vitamin C

Answer

High fiber intake

Question 7

7. Which of the following can result from long-term kidney failure?

Answer

Increased urination

Answer

Bone demineralization

Answer

Faster digestion

Answer

High oxygen levels

Question 8

8. What is the function of the renal pelvis?

Answer

Transports urine to the ureter

Answer

Filters blood

Answer

Stores urine

Answer

Produces urine

Question 9

9. What is the primary nitrogenous waste in humans?

Answer

Creatinine

Question 10

10. Which part of the nephron plays a major role in selective reabsorption?

Answer

Collecting duct

Answer

Bowman's capsule

Answer

Proximal convoluted tubule

Answer

Loop of Henle

Question 11

11. What is the function of the distal convoluted tubule?

Answer

Absorb nutrients

Answer

Regulate pH and ion balance

Answer

Filter blood

Answer

Concentrate bile

Question 12

12. Why is the medulla of the kidney important?

Answer

It filters blood

Answer

It concentrates urine

Answer

It produces bile

Answer

It stores glucose

Question 13

13. Which part of the nephron dips into the medulla of the kidney?

Answer

Collecting duct

Answer

Distal tubule

Answer

Proximal tubule

Answer

Loop of Henle

Question 14

14. Which condition may result from prolonged kidney failure?

Answer

Hyperthyroidism

Question 15

15. What causes the pain experienced during kidney stones?

Answer

Crystals moving through narrow ureters

Answer

Acid reflux

Answer

Infection of the bladder

Answer

Gas formation

Question 16

16. What structure in the kidney performs glomerular filtration?

Answer

Collecting duct

Answer

Glomerulus

Answer

Loop of Henle

Question 17

17. What does the presence of proteins in urine usually indicate?

Answer

Normal kidney function

Answer

Dehydration

Answer

Kidney damage or disease

Question 18

18. Which organ is responsible for converting ammonia into urea?

Question 19

19. Which of the following describes the kidney’s role in osmoregulation?

Answer

Filters pathogens

Answer

Produces bile

Answer

Regulates blood pressure

Answer

Balances water and salt levels

Question 20

20. What does dialysis do?

Answer

Improves digestion

Answer

Replaces kidney function by filtering blood

Answer

Filters food in the stomach

Answer

Produces bile

Question 21

21. Which of these would be abnormal in urine?

Question 22

22. Which is a method used by the body to conserve heat?

Answer

Increased breathing

Answer

Vasoconstriction

Question 23

23. Which of the following is a common symptom of kidney failure?

Answer

Swelling due to fluid retention

Answer

Frequent sneezing

Answer

Increased lung function

Question 24

24. Which structure in the nephron collects the filtrate after glomerular filtration?

Answer

Proximal tubule

Answer

Bowman's capsule

Answer

Loop of Henle

Answer

Collecting duct

Question 25

25. Which of the following causes kidney stones?

Answer

Crystal formation of salts like calcium oxalate

Answer

Vitamin C deficiency

Answer

Low blood pressure

Answer

Excessive fat

Question 26

26. What do peritubular capillaries primarily do?

Answer

Filter blood

Answer

Reabsorb water and nutrients

Answer

Absorb oxygen

Answer

Produce urine

Question 27

27. Which nitrogenous compound is the most toxic?

Answer

Creatinine

Question 28

28. Which of the following helps maintain acid-base balance in the blood?

Answer

Glomerular filtration

Answer

Vasoconstriction

Answer

Tubular secretion

Question 29

29. Which process removes drugs and toxins from the blood?

Answer

Tubular secretion

Answer

Peristalsis

Answer

Glomerular filtration

Answer

Selective reabsorption

Question 30

30. What structure delivers blood to the glomerulus?

Answer

Afferent arteriole

Answer

Efferent arteriole

Answer

Renal vein

Answer

Peritubular capillary

Question 31

31. Which of the following substances is reabsorbed during selective reabsorption?

Answer

Creatinine

Question 32

32. Which capillary bed is involved in the filtration process?

Answer

Alveolar capillaries

Answer

Peritubular capillaries

Answer

Glomerular capillaries

Answer

Vasa recta

Question 33

33. What is the main purpose of homeostasis?

Answer

Controlling external temperature

Answer

Increasing metabolism

Answer

Enhancing digestion

Answer

Maintaining internal stability

Question 34

34. Which hormone helps in water reabsorption in kidneys?

Question 35

35. What is the function of the loop of Henle?

Answer

Hormone production

Answer

Reabsorption of water and salts

Answer

Blood filtration

Answer

Glucose digestion

Question 36

36. Which capillary bed surrounds the renal tubule and assists in reabsorption?

Answer

Pulmonary capillaries

Answer

Peritubular capillaries

Answer

Glomerular capillaries

Answer

Coronary capillaries

Question 37

37. Which of the following is a nitrogenous waste product excreted in urine?

Answer

Bicarbonate

Question 38

38. Which of the following processes occurs first in urine formation?

Answer

Tubular secretion

Answer

Glomerular filtration

Answer

Selective reabsorption

Answer

Osmoregulation

Question 39

39. Which compound is least likely to be found in normal urine?

Question 40

40. What is the role of the vasa recta?

Answer

Filter blood

Answer

Store waste

Answer

Maintain salt gradient in medulla

Answer

Carry oxygen to the kidney

Question 41

41. What is the function of the ureter?

Answer

Transport urine from kidney to bladder

Answer

Reabsorb water

Answer

Filter blood

Answer

Store urine

Question 42

42. How is kidney failure commonly treated?

Answer

Vaccination

Answer

Dialysis or kidney transplant

Answer

Antibiotics

Answer

Chemotherapy

Question 43

43. Which of the following is NOT a nitrogenous waste?

Answer

Creatinine

Question 44

44. Which hormone increases urine concentration by retaining water?

Question 45

45. Which response occurs when body temperature rises too high?

Answer

Pupil dilation

Answer

Vasoconstriction

Question 46

46. What is the primary function of tubular secretion?

Answer

Removing glucose

Answer

Adding more water

Answer

Eliminating additional wastes like H+ and drugs

Answer

Reabsorbing proteins

Question 47

47. What is thermoregulation?

Answer

Maintenance of internal body temperature

Answer

Production of hormones

Answer

Blood pressure control

Answer

Regulation of blood sugar

Question 48

48. Which part of the brain controls thermoregulation?

Answer

Hypothalamus

Answer

Cerebellum

Question 49

49. Which structure collects the final urine from nephrons?

Answer

Distal tubule

Answer

Loop of Henle

Answer

Collecting duct

Question 50

50. What stimulates ADH release?

Answer

Low blood volume or high plasma osmolarity

Answer

Low heart rate

Answer

High water intake

Answer

High blood pressure

Question 51

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Total Questions:	50
Time Allowed:	25 Minutes
Total Marks:	50
How to Attempt Test:	Please choose the right Option in MCQ-type question.
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Biology Homeostasis Online Mcqs Test

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Important Biology Homeostasis Question and Answer

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