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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 structure in the kidney performs glomerular filtration?

Ureter

Loop of Henle

Collecting duct

Glomerulus

2. What is the function of the ureter?

Transport urine from kidney to bladder

Store urine

Reabsorb water

Filter blood

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

Normal kidney function

Diabetes

Dehydration

Kidney damage or disease

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

Concentrate bile

Regulate pH and ion balance

Filter blood

Absorb nutrients

5. How is kidney failure commonly treated?

Vaccination

Antibiotics

Chemotherapy

Dialysis or kidney transplant

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

Glucose

Creatinine

Ammonia

Urea

7. Which nitrogenous compound is the most toxic?

Creatinine

Urea

Uric acid

Ammonia

8. Which condition may result from prolonged kidney failure?

Hyperthyroidism

Anemia

Asthma

Jaundice

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

Collecting duct

Bowman's capsule

Proximal tubule

Loop of Henle

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

Creatinine

Urea

Ammonia

Glucose

11. Which component is most abundant in normal urine?

Protein

Water

Glucose

Red blood cells

12. Which hormone increases urine concentration by retaining water?

Thyroxine

Glucagon

Insulin

ADH

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

Collecting duct

Bowman's capsule

Loop of Henle

Proximal convoluted tubule

14. What stimulates ADH release?

High blood pressure

High water intake

Low heart rate

Low blood volume or high plasma osmolarity

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

Proximal tubule

Collecting duct

Distal tubule

Loop of Henle

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

Glucose

Urea

Bicarbonate

Oxygen

17. What leads to the formation of kidney stones?

High vitamin D

Dehydration

Acid reflux

Cold temperature

18. What structure delivers blood to the glomerulus?

Efferent arteriole

Peritubular capillary

Afferent arteriole

Renal vein

19. Which part of the brain controls thermoregulation?

Cerebrum

Medulla

Cerebellum

Hypothalamus

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

Hydrogen ions

Water

Glucose

Sodium

21. Which structure collects the final urine from nephrons?

Collecting duct

Ureter

Loop of Henle

Distal tubule

22. Why is the medulla of the kidney important?

It stores glucose

It concentrates urine

It produces bile

It filters blood

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

High oxygen levels

Faster digestion

Bone demineralization

Increased urination

24. What is the primary nitrogenous waste in humans?

Uric acid

Ammonia

Creatinine

Urea

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

Hormone production

Glucose digestion

Reabsorption of water and salts

Blood filtration

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

Peritubular capillaries

Alveolar capillaries

Vasa recta

Glomerular capillaries

27. What do peritubular capillaries primarily do?

Absorb oxygen

Produce urine

Reabsorb water and nutrients

Filter blood

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

Glucose

Water

Sodium

Urea

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

Hypertension

Uremia

Anemia

Hyperglycemia

30. What is the function of glomerular capillaries?

Perform filtration

Store waste

Secrete hormones

Reabsorb nutrients

31. What is the role of the vasa recta?

Maintain salt gradient in medulla

Store waste

Filter blood

Carry oxygen to the kidney

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

High fiber intake

Dehydration and high protein intake

Low salt diet

Excess vitamin C

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

Shivering

Sweating

Vasoconstriction

Pupil dilation

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

Produces bile

Regulates blood pressure

Filters pathogens

Balances water and salt levels

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

Tubular secretion

ADH

Vasoconstriction

Glomerular filtration

36. What causes the pain experienced during kidney stones?

Crystals moving through narrow ureters

Infection of the bladder

Acid reflux

Gas formation

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

Spleen

Pancreas

Liver

Kidney

38. Which of the following causes kidney stones?

Low blood pressure

Crystal formation of salts like calcium oxalate

Vitamin C deficiency

Excessive fat

39. Which hormone helps in water reabsorption in kidneys?

Insulin

ADH

Estrogen

Glucagon

40. What is thermoregulation?

Maintenance of internal body temperature

Blood pressure control

Regulation of blood sugar

Production of hormones

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

Glomerular capillaries

Pulmonary capillaries

Coronary capillaries

Peritubular capillaries

42. What does dialysis do?

Produces bile

Replaces kidney function by filtering blood

Filters food in the stomach

Improves digestion

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

Frequent sneezing

Swelling due to fluid retention

Sweating

Increased lung function

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

Peristalsis

Tubular secretion

Glomerular filtration

Selective reabsorption

45. What is the primary function of tubular secretion?

Eliminating additional wastes like H+ and drugs

Removing glucose

Adding more water

Reabsorbing proteins

46. What is the function of the renal pelvis?

Stores urine

Produces urine

Filters blood

Transports urine to the ureter

47. What is the main purpose of homeostasis?

Maintaining internal stability

Enhancing digestion

Controlling external temperature

Increasing metabolism

48. Which of these would be abnormal in urine?

Water

Urea

Sodium

Glucose

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

Selective reabsorption

Osmoregulation

Glomerular filtration

Tubular secretion

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

Sweating

Increased breathing

Urination

Vasoconstriction

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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

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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