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MDCAT Biology Homeostasis Online Test

Mustansar KhanLast Updated: June 14, 2025

MDCAT Biology Homeostasis Test

MDCAT Biology Homeostasis Chaper 15 Online Test

Total Questions:	50
Time Allowed:	25 Minutes
Total Marks:	50
How to Attempt Test:	Please choose the right Option in MCQ-type question.
Test Helpful For:	MDCAT Entry Test Biology Online Test Interview Questions about Biology All Universities Entrance Test Recruitments Tests

MDCAT Biology Homeostasis MCQS Online Test

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1. Which component is most abundant in normal urine?

Glucose

Red blood cells

Water

Protein

2. What is thermoregulation?

Blood pressure control

Regulation of blood sugar

Maintenance of internal body temperature

Production of hormones

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

Peritubular capillaries

Glomerular capillaries

Vasa recta

Alveolar capillaries

4. What structure in the kidney performs glomerular filtration?

Glomerulus

Collecting duct

Ureter

Loop of Henle

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

Concentrate bile

Filter blood

Absorb nutrients

Regulate pH and ion balance

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

Glomerular capillaries

Pulmonary capillaries

Coronary capillaries

Peritubular capillaries

7. Which hormone increases urine concentration by retaining water?

Insulin

Thyroxine

Glucagon

ADH

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

Glomerular filtration

Vasoconstriction

ADH

Tubular secretion

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

Proximal tubule

Distal tubule

Loop of Henle

Collecting duct

10. What do peritubular capillaries primarily do?

Produce urine

Filter blood

Absorb oxygen

Reabsorb water and nutrients

11. What does dialysis do?

Replaces kidney function by filtering blood

Improves digestion

Filters food in the stomach

Produces bile

12. Why is the medulla of the kidney important?

It produces bile

It stores glucose

It filters blood

It concentrates urine

13. Which of the following causes kidney stones?

Low blood pressure

Vitamin C deficiency

Excessive fat

Crystal formation of salts like calcium oxalate

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

Loop of Henle

Collecting duct

Bowman's capsule

Proximal convoluted tubule

15. How is kidney failure commonly treated?

Vaccination

Chemotherapy

Dialysis or kidney transplant

Antibiotics

16. What is the primary function of tubular secretion?

Removing glucose

Adding more water

Reabsorbing proteins

Eliminating additional wastes like H+ and drugs

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

Kidney

Liver

Spleen

Pancreas

18. What is the role of the vasa recta?

Carry oxygen to the kidney

Filter blood

Store waste

Maintain salt gradient in medulla

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

Produces bile

Filters pathogens

Balances water and salt levels

Regulates blood pressure

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

Dehydration and high protein intake

Excess vitamin C

High fiber intake

Low salt diet

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

Frequent sneezing

Sweating

Swelling due to fluid retention

Increased lung function

22. What causes the pain experienced during kidney stones?

Acid reflux

Infection of the bladder

Gas formation

Crystals moving through narrow ureters

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

Creatinine

Ammonia

Urea

Glucose

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

Hypertension

Hyperglycemia

Anemia

Uremia

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

Proximal tubule

Loop of Henle

Collecting duct

Bowman's capsule

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

Pupil dilation

Vasoconstriction

Sweating

Shivering

27. What is the function of the ureter?

Reabsorb water

Store urine

Transport urine from kidney to bladder

Filter blood

28. Which of these would be abnormal in urine?

Glucose

Water

Urea

Sodium

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

Creatinine

Urea

Glucose

Ammonia

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

Blood filtration

Reabsorption of water and salts

Hormone production

Glucose digestion

31. What is the primary nitrogenous waste in humans?

Uric acid

Creatinine

Ammonia

Urea

32. What stimulates ADH release?

Low blood volume or high plasma osmolarity

High water intake

High blood pressure

Low heart rate

33. What is the function of glomerular capillaries?

Secrete hormones

Perform filtration

Store waste

Reabsorb nutrients

34. Which part of the brain controls thermoregulation?

Hypothalamus

Cerebrum

Medulla

Cerebellum

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

Glucose

Oxygen

Urea

Bicarbonate

36. What leads to the formation of kidney stones?

High vitamin D

Dehydration

Acid reflux

Cold temperature

37. Which condition may result from prolonged kidney failure?

Jaundice

Anemia

Hyperthyroidism

Asthma

38. Which hormone helps in water reabsorption in kidneys?

Estrogen

Insulin

ADH

Glucagon

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

Bone demineralization

Increased urination

Faster digestion

High oxygen levels

40. Which nitrogenous compound is the most toxic?

Uric acid

Urea

Creatinine

Ammonia

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

Increased breathing

Urination

Vasoconstriction

Sweating

42. What is the main purpose of homeostasis?

Enhancing digestion

Controlling external temperature

Maintaining internal stability

Increasing metabolism

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

Tubular secretion

Glomerular filtration

Selective reabsorption

Osmoregulation

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

Water

Hydrogen ions

Sodium

Glucose

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

Diabetes

Kidney damage or disease

Dehydration

Normal kidney function

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

Urea

Glucose

Water

Sodium

47. What is the function of the renal pelvis?

Filters blood

Produces urine

Stores urine

Transports urine to the ureter

48. What structure delivers blood to the glomerulus?

Efferent arteriole

Afferent arteriole

Peritubular capillary

Renal vein

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

Glomerular filtration

Tubular secretion

Selective reabsorption

Peristalsis

50. Which structure collects the final urine from nephrons?

Ureter

Distal tubule

Collecting duct

Loop of Henle

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Mustansar KhanLast Updated: June 14, 2025

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MDCAT Biology Homeostasis Online Test

MDCAT Biology Homeostasis Test

MDCAT Biology Homeostasis Chaper 15 Online Test

MDCAT Biology Homeostasis MCQS Online Test

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Mustansar Khan

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MDCAT Biology Homeostasis Test

MDCAT Biology Homeostasis Chaper 15 Online Test

MDCAT Biology Homeostasis MCQS Online Test

Uncategorized

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Mustansar Khan

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