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MDCAT 2025 Biology Homeostasis Test Online Mcqs

Malik TahirLast Updated: July 11, 2025

MDCAT Biology Homeostasis Test

Prepare for MDCAT 2025 Biology with this Homeostasis MCQ test, based on the official PMDC syllabus. Practice key concepts like osmoregulation, thermoregulation, and excretion with chapter-wise questions to strengthen your exam preparation.

Online Biology Homeostasis 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

Homeostasis Online Test Question with Answer

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1. What do peritubular capillaries primarily do?

Filter blood

Produce urine

Absorb oxygen

Reabsorb water and nutrients

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

Spleen

Liver

Kidney

Pancreas

3. What is the function of the ureter?

Store urine

Transport urine from kidney to bladder

Reabsorb water

Filter blood

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

Tubular secretion

Glomerular filtration

Osmoregulation

Selective reabsorption

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

ADH

Tubular secretion

Glomerular filtration

Vasoconstriction

6. Which hormone helps in water reabsorption in kidneys?

Insulin

Estrogen

Glucagon

ADH

7. What structure delivers blood to the glomerulus?

Renal vein

Peritubular capillary

Afferent arteriole

Efferent arteriole

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

Hypertension

Hyperglycemia

Anemia

Uremia

9. What causes the pain experienced during kidney stones?

Gas formation

Infection of the bladder

Crystals moving through narrow ureters

Acid reflux

10. Which part of the brain controls thermoregulation?

Cerebrum

Hypothalamus

Medulla

Cerebellum

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

Glucose

Creatinine

Urea

Ammonia

12. Which of the following causes kidney stones?

Crystal formation of salts like calcium oxalate

Excessive fat

Vitamin C deficiency

Low blood pressure

13. What structure in the kidney performs glomerular filtration?

Glomerulus

Collecting duct

Loop of Henle

Ureter

14. What is the main purpose of homeostasis?

Enhancing digestion

Maintaining internal stability

Controlling external temperature

Increasing metabolism

15. Which nitrogenous compound is the most toxic?

Creatinine

Ammonia

Uric acid

Urea

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

Dehydration

Kidney damage or disease

Normal kidney function

Diabetes

17. What is the primary nitrogenous waste in humans?

Ammonia

Urea

Uric acid

Creatinine

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

Peristalsis

Glomerular filtration

Tubular secretion

Selective reabsorption

19. What leads to the formation of kidney stones?

Cold temperature

Acid reflux

High vitamin D

Dehydration

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

Ammonia

Creatinine

Urea

Glucose

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

Vasa recta

Alveolar capillaries

Glomerular capillaries

Peritubular capillaries

22. What is thermoregulation?

Regulation of blood sugar

Production of hormones

Maintenance of internal body temperature

Blood pressure control

23. What is the primary function of tubular secretion?

Removing glucose

Adding more water

Eliminating additional wastes like H+ and drugs

Reabsorbing proteins

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

Regulate pH and ion balance

Concentrate bile

Absorb nutrients

Filter blood

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

Coronary capillaries

Pulmonary capillaries

Peritubular capillaries

Glomerular capillaries

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

Urea

Bicarbonate

Oxygen

Glucose

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

Sodium

Urea

Glucose

Water

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

Loop of Henle

Proximal tubule

Distal tubule

Collecting duct

29. Which component is most abundant in normal urine?

Glucose

Protein

Water

Red blood cells

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

Vasoconstriction

Sweating

Increased breathing

Urination

31. What stimulates ADH release?

Low heart rate

High water intake

Low blood volume or high plasma osmolarity

High blood pressure

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

Bowman's capsule

Loop of Henle

Proximal tubule

Collecting duct

33. What is the role of the vasa recta?

Carry oxygen to the kidney

Store waste

Filter blood

Maintain salt gradient in medulla

34. Which condition may result from prolonged kidney failure?

Jaundice

Hyperthyroidism

Anemia

Asthma

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

Hormone production

Reabsorption of water and salts

Blood filtration

Glucose digestion

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

Balances water and salt levels

Regulates blood pressure

Produces bile

Filters pathogens

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

Collecting duct

Bowman's capsule

Loop of Henle

Proximal convoluted tubule

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

Swelling due to fluid retention

Frequent sneezing

Increased lung function

Sweating

39. What does dialysis do?

Improves digestion

Filters food in the stomach

Produces bile

Replaces kidney function by filtering blood

40. Why is the medulla of the kidney important?

It stores glucose

It produces bile

It concentrates urine

It filters blood

41. How is kidney failure commonly treated?

Vaccination

Dialysis or kidney transplant

Antibiotics

Chemotherapy

42. What is the function of glomerular capillaries?

Reabsorb nutrients

Store waste

Secrete hormones

Perform filtration

43. Which structure collects the final urine from nephrons?

Loop of Henle

Ureter

Collecting duct

Distal tubule

44. What is the function of the renal pelvis?

Produces urine

Filters blood

Transports urine to the ureter

Stores urine

45. Which hormone increases urine concentration by retaining water?

Thyroxine

Insulin

Glucagon

ADH

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

Sweating

Vasoconstriction

Pupil dilation

Shivering

47. Which of these would be abnormal in urine?

Urea

Water

Sodium

Glucose

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

Faster digestion

Bone demineralization

High oxygen levels

Increased urination

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

Dehydration and high protein intake

Low salt diet

Excess vitamin C

High fiber intake

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

Water

Hydrogen ions

Glucose

Sodium

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Malik TahirLast Updated: July 11, 2025

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19 Comments

Rabia says:

August 11, 2022 at 8:22 pm

I got 24 /25

Rabia says:

August 11, 2022 at 8:22 pm

I got 24 out of 25

Ali Ahmed says:

January 12, 2022 at 2:35 pm

I want study in kips

FATIMA KHAN says:

December 19, 2021 at 1:17 pm

These questions are taken from punjab textbook board??

Alina Qazi says:

October 8, 2021 at 3:12 pm

What is face back mechanism?
Please tell the book where there’s written about face back mechanism?

Sajjad Baloch says:

September 13, 2021 at 9:13 am

Best efforts dear

Sanan farzand says:

August 1, 2021 at 1:20 pm

Good thing

Alimardan says:

February 27, 2021 at 9:47 pm

PRE medical

Abdullah munir says:

October 18, 2020 at 7:10 pm

no preparation, Fsc student and 80% marks i am such a dumb student :<

tanya amir says:

September 20, 2020 at 8:34 pm

i got 92 without even reading the chapter

AbuHuraira says:

August 21, 2020 at 1:27 pm

Allah Tera Shukar ha

zafar mirza says:

July 3, 2020 at 5:35 pm

wow it really a good website for all of us for preperation
i got 96 percent

Syeda Shereen Gardazi says:

July 15, 2017 at 11:12 am

Waoooo i got 96% , its really a good way to learn , .

1. Asad says:
  
  October 22, 2018 at 2:22 pm
  
  waah nice
  
  1. AbuHuraira says:
    
    August 21, 2020 at 1:26 pm
    
    Allah tera Shukar ha
    
Nayaab says:

March 10, 2017 at 3:14 pm

100% Unbeatable.!!!Not too surprising as I always get Lol :p
Guys do your best for the mcat and Allah will do the rest 🙂 Best of luck to all <3

shabir ahmed says:

May 26, 2016 at 4:15 pm

it was my frst time to,,, no preparation

1. Ahmar says:
  
  July 16, 2020 at 11:57 pm
  
  same bruh.Everyone bragging off about their scores lol
  
Hamza jutt says:

April 19, 2016 at 10:25 pm

Yo got 92% thanks gotest

MDCAT 2025 Biology Homeostasis Test Online Mcqs

MDCAT Biology Homeostasis Test

Online Biology Homeostasis Test

Homeostasis Online Test Question with Answer

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Malik Tahir

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