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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 thermoregulation?

Blood pressure control

Maintenance of internal body temperature

Regulation of blood sugar

Production of hormones

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

Hypertension

Uremia

Anemia

Hyperglycemia

3. Which part of the brain controls thermoregulation?

Medulla

Cerebrum

Hypothalamus

Cerebellum

4. What is the function of the ureter?

Store urine

Reabsorb water

Filter blood

Transport urine from kidney to bladder

5. Which hormone increases urine concentration by retaining water?

Glucagon

ADH

Insulin

Thyroxine

6. How is kidney failure commonly treated?

Antibiotics

Chemotherapy

Dialysis or kidney transplant

Vaccination

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

Filters pathogens

Produces bile

Balances water and salt levels

Regulates blood pressure

8. What do peritubular capillaries primarily do?

Produce urine

Absorb oxygen

Reabsorb water and nutrients

Filter blood

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

Blood filtration

Hormone production

Glucose digestion

Reabsorption of water and salts

10. What is the main purpose of homeostasis?

Controlling external temperature

Enhancing digestion

Increasing metabolism

Maintaining internal stability

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

Bowman's capsule

Loop of Henle

Proximal tubule

Collecting duct

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

Glomerular filtration

Tubular secretion

Selective reabsorption

Osmoregulation

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

Pupil dilation

Sweating

Shivering

Vasoconstriction

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

ADH

Tubular secretion

Glomerular filtration

Vasoconstriction

15. What is the function of glomerular capillaries?

Store waste

Perform filtration

Reabsorb nutrients

Secrete hormones

16. What structure in the kidney performs glomerular filtration?

Glomerulus

Loop of Henle

Collecting duct

Ureter

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

Sweating

Increased lung function

Frequent sneezing

Swelling due to fluid retention

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

High fiber intake

Excess vitamin C

Low salt diet

Dehydration and high protein intake

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

Tubular secretion

Peristalsis

Selective reabsorption

Glomerular filtration

20. What is the primary nitrogenous waste in humans?

Urea

Uric acid

Ammonia

Creatinine

21. What is the function of the renal pelvis?

Produces urine

Stores urine

Filters blood

Transports urine to the ureter

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

Ammonia

Glucose

Creatinine

Urea

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

Kidney damage or disease

Diabetes

Dehydration

Normal kidney function

24. What leads to the formation of kidney stones?

Cold temperature

Dehydration

High vitamin D

Acid reflux

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

Glucose

Water

Hydrogen ions

Sodium

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26. Which nitrogenous compound is the most toxic?

Creatinine

Uric acid

Urea

Ammonia

27. What stimulates ADH release?

Low blood volume or high plasma osmolarity

High blood pressure

High water intake

Low heart rate

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

Collecting duct

Distal tubule

Loop of Henle

Proximal tubule

29. What is the role of the vasa recta?

Carry oxygen to the kidney

Store waste

Filter blood

Maintain salt gradient in medulla

30. What is the primary function of tubular secretion?

Reabsorbing proteins

Adding more water

Eliminating additional wastes like H+ and drugs

Removing glucose

31. What structure delivers blood to the glomerulus?

Efferent arteriole

Afferent arteriole

Peritubular capillary

Renal vein

32. What does dialysis do?

Improves digestion

Replaces kidney function by filtering blood

Produces bile

Filters food in the stomach

33. Which hormone helps in water reabsorption in kidneys?

ADH

Estrogen

Glucagon

Insulin

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

Creatinine

Ammonia

Glucose

Urea

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

Bone demineralization

Faster digestion

High oxygen levels

Increased urination

36. Which structure collects the final urine from nephrons?

Collecting duct

Ureter

Distal tubule

Loop of Henle

37. Which of the following causes kidney stones?

Low blood pressure

Vitamin C deficiency

Crystal formation of salts like calcium oxalate

Excessive fat

38. What causes the pain experienced during kidney stones?

Acid reflux

Infection of the bladder

Gas formation

Crystals moving through narrow ureters

39. Why is the medulla of the kidney important?

It concentrates urine

It stores glucose

It filters blood

It produces bile

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

Oxygen

Urea

Bicarbonate

Glucose

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

Sweating

Urination

Increased breathing

Vasoconstriction

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

Urea

Water

Glucose

Sodium

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

Collecting duct

Bowman's capsule

Loop of Henle

Proximal convoluted tubule

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

Spleen

Kidney

Pancreas

Liver

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

Regulate pH and ion balance

Filter blood

Concentrate bile

Absorb nutrients

46. Which component is most abundant in normal urine?

Water

Red blood cells

Protein

Glucose

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

Glomerular capillaries

Vasa recta

Peritubular capillaries

Alveolar capillaries

48. Which condition may result from prolonged kidney failure?

Asthma

Jaundice

Anemia

Hyperthyroidism

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

Pulmonary capillaries

Peritubular capillaries

Glomerular capillaries

Coronary capillaries

50. Which of these would be abnormal in urine?

Glucose

Urea

Water

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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