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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 increases the risk of kidney stones?

Excess vitamin C

Low salt diet

Dehydration and high protein intake

High fiber intake

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

Frequent sneezing

Sweating

Increased lung function

Swelling due to fluid retention

3. What is the function of the ureter?

Transport urine from kidney to bladder

Store urine

Filter blood

Reabsorb water

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

Bowman's capsule

Loop of Henle

Collecting duct

Proximal tubule

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

Hydrogen ions

Glucose

Water

Sodium

6. Which nitrogenous compound is the most toxic?

Creatinine

Uric acid

Urea

Ammonia

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

Diabetes

Normal kidney function

Kidney damage or disease

Dehydration

8. Which hormone increases urine concentration by retaining water?

Thyroxine

ADH

Insulin

Glucagon

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

Ammonia

Creatinine

Glucose

Urea

10. What is the main purpose of homeostasis?

Enhancing digestion

Controlling external temperature

Increasing metabolism

Maintaining internal stability

11. Why is the medulla of the kidney important?

It filters blood

It stores glucose

It produces bile

It concentrates urine

12. What is the function of glomerular capillaries?

Reabsorb nutrients

Secrete hormones

Perform filtration

Store waste

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

Anemia

Uremia

Hyperglycemia

Hypertension

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

Loop of Henle

Proximal tubule

Distal tubule

Collecting duct

15. What causes the pain experienced during kidney stones?

Acid reflux

Infection of the bladder

Crystals moving through narrow ureters

Gas formation

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

Glucose

Creatinine

Ammonia

Urea

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

High oxygen levels

Increased urination

Faster digestion

Bone demineralization

18. What is the primary nitrogenous waste in humans?

Uric acid

Ammonia

Urea

Creatinine

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

Concentrate bile

Regulate pH and ion balance

Filter blood

Absorb nutrients

20. What is the function of the renal pelvis?

Stores urine

Produces urine

Filters blood

Transports urine to the ureter

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

Reabsorption of water and salts

Glucose digestion

Hormone production

Blood filtration

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

Peritubular capillaries

Coronary capillaries

Pulmonary capillaries

Glomerular capillaries

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

Bowman's capsule

Collecting duct

Loop of Henle

Proximal convoluted tubule

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

Sodium

Glucose

Water

Urea

25. What is the primary function of tubular secretion?

Eliminating additional wastes like H+ and drugs

Removing glucose

Adding more water

Reabsorbing proteins

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26. Which condition may result from prolonged kidney failure?

Anemia

Jaundice

Hyperthyroidism

Asthma

27. Which hormone helps in water reabsorption in kidneys?

ADH

Glucagon

Insulin

Estrogen

28. What is the role of the vasa recta?

Carry oxygen to the kidney

Store waste

Filter blood

Maintain salt gradient in medulla

29. Which part of the brain controls thermoregulation?

Medulla

Hypothalamus

Cerebrum

Cerebellum

30. Which structure collects the final urine from nephrons?

Collecting duct

Loop of Henle

Distal tubule

Ureter

31. Which of these would be abnormal in urine?

Urea

Water

Glucose

Sodium

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

Bicarbonate

Oxygen

Urea

Glucose

33. What do peritubular capillaries primarily do?

Absorb oxygen

Produce urine

Reabsorb water and nutrients

Filter blood

34. What does dialysis do?

Improves digestion

Filters food in the stomach

Replaces kidney function by filtering blood

Produces bile

35. What structure in the kidney performs glomerular filtration?

Ureter

Loop of Henle

Collecting duct

Glomerulus

36. Which of the following causes kidney stones?

Vitamin C deficiency

Crystal formation of salts like calcium oxalate

Excessive fat

Low blood pressure

37. What is thermoregulation?

Production of hormones

Regulation of blood sugar

Maintenance of internal body temperature

Blood pressure control

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

Peristalsis

Selective reabsorption

Glomerular filtration

Tubular secretion

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

Glomerular filtration

Tubular secretion

Osmoregulation

Selective reabsorption

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

Sweating

Urination

Vasoconstriction

Increased breathing

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

Alveolar capillaries

Glomerular capillaries

Vasa recta

Peritubular capillaries

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

Filters pathogens

Regulates blood pressure

Balances water and salt levels

Produces bile

43. What leads to the formation of kidney stones?

Dehydration

Acid reflux

Cold temperature

High vitamin D

44. What stimulates ADH release?

High blood pressure

Low heart rate

Low blood volume or high plasma osmolarity

High water intake

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

Kidney

Liver

Spleen

Pancreas

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

Vasoconstriction

Pupil dilation

Sweating

Shivering

47. What structure delivers blood to the glomerulus?

Efferent arteriole

Renal vein

Peritubular capillary

Afferent arteriole

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

ADH

Tubular secretion

Vasoconstriction

Glomerular filtration

49. Which component is most abundant in normal urine?

Water

Glucose

Protein

Red blood cells

50. How is kidney failure commonly treated?

Vaccination

Antibiotics

Chemotherapy

Dialysis or kidney transplant

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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

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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