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

Vasoconstriction

Glomerular filtration

ADH

Tubular secretion

2. Which part of the brain controls thermoregulation?

Cerebellum

Medulla

Hypothalamus

Cerebrum

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

Pancreas

Spleen

Kidney

Liver

4. Which hormone helps in water reabsorption in kidneys?

Glucagon

ADH

Insulin

Estrogen

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

Urea

Creatinine

Glucose

Ammonia

6. Which of these would be abnormal in urine?

Glucose

Urea

Sodium

Water

7. What is the primary function of tubular secretion?

Adding more water

Removing glucose

Eliminating additional wastes like H+ and drugs

Reabsorbing proteins

8. What is the function of glomerular capillaries?

Store waste

Reabsorb nutrients

Perform filtration

Secrete hormones

9. What structure delivers blood to the glomerulus?

Peritubular capillary

Efferent arteriole

Afferent arteriole

Renal vein

10. Which component is most abundant in normal urine?

Red blood cells

Glucose

Water

Protein

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

Loop of Henle

Proximal convoluted tubule

Bowman's capsule

Collecting duct

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

Water

Sodium

Glucose

Hydrogen ions

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

Low salt diet

Dehydration and high protein intake

High fiber intake

Excess vitamin C

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

Ammonia

Glucose

Creatinine

Urea

15. What leads to the formation of kidney stones?

Cold temperature

High vitamin D

Dehydration

Acid reflux

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

Filters pathogens

Produces bile

Balances water and salt levels

Regulates blood pressure

17. What do peritubular capillaries primarily do?

Absorb oxygen

Reabsorb water and nutrients

Filter blood

Produce urine

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

Regulate pH and ion balance

Filter blood

Absorb nutrients

Concentrate bile

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

Sweating

Frequent sneezing

Increased lung function

Swelling due to fluid retention

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

Dehydration

Diabetes

Normal kidney function

Kidney damage or disease

21. What is the role of the vasa recta?

Filter blood

Store waste

Maintain salt gradient in medulla

Carry oxygen to the kidney

22. What is the function of the renal pelvis?

Transports urine to the ureter

Produces urine

Stores urine

Filters blood

23. Which of the following causes kidney stones?

Low blood pressure

Excessive fat

Vitamin C deficiency

Crystal formation of salts like calcium oxalate

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

Peristalsis

Selective reabsorption

Tubular secretion

Glomerular filtration

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

Pupil dilation

Vasoconstriction

Sweating

Shivering

Page 2 of 2

26. What is thermoregulation?

Maintenance of internal body temperature

Regulation of blood sugar

Blood pressure control

Production of hormones

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

Urination

Increased breathing

Vasoconstriction

Sweating

28. What stimulates ADH release?

Low heart rate

High blood pressure

High water intake

Low blood volume or high plasma osmolarity

29. How is kidney failure commonly treated?

Dialysis or kidney transplant

Vaccination

Chemotherapy

Antibiotics

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

Water

Urea

Glucose

Sodium

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

Peritubular capillaries

Glomerular capillaries

Coronary capillaries

Pulmonary capillaries

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

Selective reabsorption

Osmoregulation

Glomerular filtration

Tubular secretion

33. Which nitrogenous compound is the most toxic?

Urea

Uric acid

Creatinine

Ammonia

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

Hormone production

Blood filtration

Reabsorption of water and salts

Glucose digestion

35. What is the main purpose of homeostasis?

Increasing metabolism

Maintaining internal stability

Enhancing digestion

Controlling external temperature

36. What causes the pain experienced during kidney stones?

Gas formation

Acid reflux

Crystals moving through narrow ureters

Infection of the bladder

37. Which condition may result from prolonged kidney failure?

Jaundice

Hyperthyroidism

Anemia

Asthma

38. What structure in the kidney performs glomerular filtration?

Glomerulus

Collecting duct

Ureter

Loop of Henle

39. Which hormone increases urine concentration by retaining water?

Insulin

ADH

Thyroxine

Glucagon

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

Collecting duct

Loop of Henle

Bowman's capsule

Proximal tubule

41. What does dialysis do?

Produces bile

Filters food in the stomach

Improves digestion

Replaces kidney function by filtering blood

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

Faster digestion

Bone demineralization

High oxygen levels

Increased urination

43. What is the primary nitrogenous waste in humans?

Uric acid

Urea

Creatinine

Ammonia

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

Glucose

Urea

Oxygen

Bicarbonate

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

Collecting duct

Distal tubule

Proximal tubule

Loop of Henle

46. What is the function of the ureter?

Store urine

Filter blood

Transport urine from kidney to bladder

Reabsorb water

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

Hyperglycemia

Uremia

Anemia

Hypertension

48. Why is the medulla of the kidney important?

It produces bile

It stores glucose

It filters blood

It concentrates urine

49. Which structure collects the final urine from nephrons?

Ureter

Distal tubule

Loop of Henle

Collecting duct

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

Vasa recta

Alveolar capillaries

Glomerular capillaries

Peritubular capillaries

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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

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MDCAT 2025 Biology Homeostasis Test Online Mcqs

MDCAT Biology Homeostasis Test

Online Biology Homeostasis Test

Homeostasis Online Test Question with Answer

Uncategorized

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Malik Tahir

19 Comments

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MDCAT Biology Homeostasis Test

Online Biology Homeostasis Test

Homeostasis Online Test Question with Answer

Uncategorized

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Malik Tahir

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