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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 hormone increases urine concentration by retaining water?

Glucagon

Insulin

ADH

Thyroxine

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

Sweating

Vasoconstriction

Increased breathing

Urination

3. What is thermoregulation?

Maintenance of internal body temperature

Regulation of blood sugar

Production of hormones

Blood pressure control

4. Why is the medulla of the kidney important?

It filters blood

It produces bile

It concentrates urine

It stores glucose

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

Concentrate bile

Filter blood

Absorb nutrients

Regulate pH and ion balance

6. Which of these would be abnormal in urine?

Urea

Glucose

Sodium

Water

7. What is the role of the vasa recta?

Carry oxygen to the kidney

Store waste

Maintain salt gradient in medulla

Filter blood

8. Which of the following causes kidney stones?

Low blood pressure

Crystal formation of salts like calcium oxalate

Excessive fat

Vitamin C deficiency

9. What is the main purpose of homeostasis?

Maintaining internal stability

Increasing metabolism

Controlling external temperature

Enhancing digestion

10. Which part of the brain controls thermoregulation?

Hypothalamus

Medulla

Cerebellum

Cerebrum

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

Collecting duct

Bowman's capsule

Proximal convoluted tubule

Loop of Henle

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

Spleen

Pancreas

Liver

Kidney

13. What is the primary function of tubular secretion?

Removing glucose

Eliminating additional wastes like H+ and drugs

Adding more water

Reabsorbing proteins

14. Which condition may result from prolonged kidney failure?

Asthma

Jaundice

Anemia

Hyperthyroidism

15. What is the function of the ureter?

Reabsorb water

Transport urine from kidney to bladder

Store urine

Filter blood

16. What causes the pain experienced during kidney stones?

Gas formation

Crystals moving through narrow ureters

Acid reflux

Infection of the bladder

17. What structure delivers blood to the glomerulus?

Peritubular capillary

Efferent arteriole

Afferent arteriole

Renal vein

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

Balances water and salt levels

Regulates blood pressure

Produces bile

Filters pathogens

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

Sodium

Urea

Water

Glucose

20. What is the primary nitrogenous waste in humans?

Creatinine

Ammonia

Uric acid

Urea

21. Which structure collects the final urine from nephrons?

Collecting duct

Ureter

Loop of Henle

Distal tubule

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

Peritubular capillaries

Coronary capillaries

Glomerular capillaries

Pulmonary capillaries

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

Vasoconstriction

Tubular secretion

Glomerular filtration

ADH

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

Proximal tubule

Bowman's capsule

Loop of Henle

Collecting duct

25. How is kidney failure commonly treated?

Antibiotics

Chemotherapy

Dialysis or kidney transplant

Vaccination

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26. Which nitrogenous compound is the most toxic?

Ammonia

Uric acid

Creatinine

Urea

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

Selective reabsorption

Peristalsis

Tubular secretion

Glomerular filtration

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

Urea

Glucose

Oxygen

Bicarbonate

29. Which component is most abundant in normal urine?

Red blood cells

Water

Glucose

Protein

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

Vasa recta

Glomerular capillaries

Alveolar capillaries

Peritubular capillaries

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

Swelling due to fluid retention

Sweating

Frequent sneezing

Increased lung function

32. What leads to the formation of kidney stones?

Dehydration

High vitamin D

Cold temperature

Acid reflux

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

Kidney damage or disease

Diabetes

Normal kidney function

Dehydration

34. What do peritubular capillaries primarily do?

Filter blood

Absorb oxygen

Reabsorb water and nutrients

Produce urine

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

Glucose

Water

Sodium

Hydrogen ions

36. What does dialysis do?

Filters food in the stomach

Produces bile

Replaces kidney function by filtering blood

Improves digestion

37. What is the function of glomerular capillaries?

Store waste

Perform filtration

Secrete hormones

Reabsorb nutrients

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

Pupil dilation

Vasoconstriction

Shivering

Sweating

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

Hyperglycemia

Anemia

Uremia

Hypertension

40. What stimulates ADH release?

High water intake

High blood pressure

Low heart rate

Low blood volume or high plasma osmolarity

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

Glucose digestion

Blood filtration

Hormone production

Reabsorption of water and salts

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

Selective reabsorption

Glomerular filtration

Osmoregulation

Tubular secretion

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

High fiber intake

Dehydration and high protein intake

Excess vitamin C

Low salt diet

44. What structure in the kidney performs glomerular filtration?

Glomerulus

Collecting duct

Ureter

Loop of Henle

45. Which hormone helps in water reabsorption in kidneys?

Estrogen

Insulin

ADH

Glucagon

46. What is the function of the renal pelvis?

Transports urine to the ureter

Produces urine

Stores urine

Filters blood

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

High oxygen levels

Bone demineralization

Increased urination

Faster digestion

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

Loop of Henle

Proximal tubule

Distal tubule

Collecting duct

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

Urea

Creatinine

Glucose

Ammonia

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

Urea

Creatinine

Ammonia

Glucose

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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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