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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 is the main purpose of homeostasis?

Controlling external temperature

Maintaining internal stability

Enhancing digestion

Increasing metabolism

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

Vasa recta

Alveolar capillaries

Glomerular capillaries

Peritubular capillaries

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

Frequent sneezing

Swelling due to fluid retention

Sweating

Increased lung function

4. What is the function of the ureter?

Filter blood

Transport urine from kidney to bladder

Reabsorb water

Store urine

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

Urea

Glucose

Creatinine

Ammonia

6. Which part of the brain controls thermoregulation?

Cerebrum

Cerebellum

Hypothalamus

Medulla

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

Bicarbonate

Urea

Glucose

Oxygen

8. What leads to the formation of kidney stones?

High vitamin D

Acid reflux

Cold temperature

Dehydration

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

Bone demineralization

High oxygen levels

Increased urination

Faster digestion

10. What does dialysis do?

Produces bile

Replaces kidney function by filtering blood

Filters food in the stomach

Improves digestion

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

Glomerular filtration

Tubular secretion

Peristalsis

Selective reabsorption

12. Which hormone increases urine concentration by retaining water?

Insulin

Glucagon

Thyroxine

ADH

13. What is the function of glomerular capillaries?

Secrete hormones

Perform filtration

Store waste

Reabsorb nutrients

14. Which of the following causes kidney stones?

Crystal formation of salts like calcium oxalate

Excessive fat

Vitamin C deficiency

Low blood pressure

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

Tubular secretion

Glomerular filtration

Osmoregulation

Selective reabsorption

16. What causes the pain experienced during kidney stones?

Gas formation

Infection of the bladder

Crystals moving through narrow ureters

Acid reflux

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

Dehydration

Diabetes

Normal kidney function

Kidney damage or disease

18. Which hormone helps in water reabsorption in kidneys?

ADH

Insulin

Glucagon

Estrogen

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

Regulates blood pressure

Balances water and salt levels

Produces bile

Filters pathogens

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

Sodium

Urea

Water

Glucose

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

Loop of Henle

Collecting duct

Bowman's capsule

Proximal tubule

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

Reabsorption of water and salts

Glucose digestion

Hormone production

Blood filtration

23. What do peritubular capillaries primarily do?

Absorb oxygen

Produce urine

Reabsorb water and nutrients

Filter blood

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

Water

Hydrogen ions

Glucose

Sodium

25. Which of these would be abnormal in urine?

Urea

Sodium

Water

Glucose

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

Concentrate bile

Absorb nutrients

Regulate pH and ion balance

Filter blood

27. Which structure collects the final urine from nephrons?

Ureter

Distal tubule

Loop of Henle

Collecting duct

28. What is the primary nitrogenous waste in humans?

Creatinine

Uric acid

Ammonia

Urea

29. Which condition may result from prolonged kidney failure?

Asthma

Jaundice

Hyperthyroidism

Anemia

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

Urea

Ammonia

Glucose

Creatinine

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

Low salt diet

Dehydration and high protein intake

Excess vitamin C

High fiber intake

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

Coronary capillaries

Pulmonary capillaries

Glomerular capillaries

Peritubular capillaries

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

Liver

Kidney

Pancreas

Spleen

34. How is kidney failure commonly treated?

Dialysis or kidney transplant

Chemotherapy

Vaccination

Antibiotics

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

Proximal tubule

Distal tubule

Collecting duct

Loop of Henle

36. What is the role of the vasa recta?

Carry oxygen to the kidney

Maintain salt gradient in medulla

Store waste

Filter blood

37. What is the primary function of tubular secretion?

Eliminating additional wastes like H+ and drugs

Reabsorbing proteins

Removing glucose

Adding more water

38. Which component is most abundant in normal urine?

Protein

Glucose

Red blood cells

Water

39. What is the function of the renal pelvis?

Stores urine

Produces urine

Transports urine to the ureter

Filters blood

40. What stimulates ADH release?

Low heart rate

High blood pressure

High water intake

Low blood volume or high plasma osmolarity

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

Urination

Sweating

Increased breathing

Vasoconstriction

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

Sweating

Vasoconstriction

Shivering

Pupil dilation

43. What structure delivers blood to the glomerulus?

Renal vein

Efferent arteriole

Peritubular capillary

Afferent arteriole

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

Uremia

Hypertension

Anemia

Hyperglycemia

45. Why is the medulla of the kidney important?

It stores glucose

It filters blood

It concentrates urine

It produces bile

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

Loop of Henle

Collecting duct

Proximal convoluted tubule

Bowman's capsule

47. What is thermoregulation?

Maintenance of internal body temperature

Production of hormones

Regulation of blood sugar

Blood pressure control

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

Glomerular filtration

Vasoconstriction

Tubular secretion

ADH

49. What structure in the kidney performs glomerular filtration?

Collecting duct

Loop of Henle

Glomerulus

Ureter

50. Which nitrogenous compound is the most toxic?

Ammonia

Urea

Creatinine

Uric acid

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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

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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

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Malik Tahir

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