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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 these would be abnormal in urine?

Sodium

Water

Glucose

Urea

2. What is the function of the renal pelvis?

Filters blood

Produces urine

Stores urine

Transports urine to the ureter

3. What stimulates ADH release?

Low heart rate

High blood pressure

High water intake

Low blood volume or high plasma osmolarity

4. What is the role of the vasa recta?

Filter blood

Store waste

Carry oxygen to the kidney

Maintain salt gradient in medulla

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

Vasoconstriction

Increased breathing

Urination

Sweating

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

Filters pathogens

Regulates blood pressure

Produces bile

Balances water and salt levels

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

Hydrogen ions

Glucose

Sodium

Water

8. Which part of the brain controls thermoregulation?

Hypothalamus

Medulla

Cerebellum

Cerebrum

9. What structure in the kidney performs glomerular filtration?

Collecting duct

Ureter

Glomerulus

Loop of Henle

10. Which component is most abundant in normal urine?

Glucose

Red blood cells

Protein

Water

11. Which of the following causes kidney stones?

Excessive fat

Vitamin C deficiency

Low blood pressure

Crystal formation of salts like calcium oxalate

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

Dehydration and high protein intake

Excess vitamin C

High fiber intake

Low salt diet

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

Collecting duct

Distal tubule

Proximal tubule

Loop of Henle

14. Which structure collects the final urine from nephrons?

Ureter

Collecting duct

Loop of Henle

Distal tubule

15. Which hormone helps in water reabsorption in kidneys?

Estrogen

Glucagon

Insulin

ADH

16. What do peritubular capillaries primarily do?

Absorb oxygen

Filter blood

Produce urine

Reabsorb water and nutrients

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

Urea

Water

Sodium

Glucose

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

Proximal convoluted tubule

Bowman's capsule

Loop of Henle

Collecting duct

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

High oxygen levels

Bone demineralization

Faster digestion

Increased urination

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

Filter blood

Regulate pH and ion balance

Concentrate bile

Absorb nutrients

21. Which nitrogenous compound is the most toxic?

Creatinine

Ammonia

Uric acid

Urea

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

Kidney damage or disease

Normal kidney function

Dehydration

Diabetes

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

Creatinine

Ammonia

Glucose

Urea

24. What causes the pain experienced during kidney stones?

Crystals moving through narrow ureters

Gas formation

Acid reflux

Infection of the bladder

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

Glucose digestion

Blood filtration

Reabsorption of water and salts

Hormone production

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26. What is the primary function of tubular secretion?

Adding more water

Removing glucose

Reabsorbing proteins

Eliminating additional wastes like H+ and drugs

27. What does dialysis do?

Improves digestion

Replaces kidney function by filtering blood

Produces bile

Filters food in the stomach

28. What is the function of the ureter?

Store urine

Transport urine from kidney to bladder

Filter blood

Reabsorb water

29. Why is the medulla of the kidney important?

It produces bile

It stores glucose

It filters blood

It concentrates urine

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

Hyperglycemia

Anemia

Uremia

Hypertension

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

Vasoconstriction

ADH

Glomerular filtration

Tubular secretion

32. What structure delivers blood to the glomerulus?

Efferent arteriole

Afferent arteriole

Renal vein

Peritubular capillary

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

Liver

Kidney

Spleen

Pancreas

34. What is the main purpose of homeostasis?

Controlling external temperature

Increasing metabolism

Maintaining internal stability

Enhancing digestion

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

Creatinine

Urea

Glucose

Ammonia

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

Loop of Henle

Bowman's capsule

Proximal tubule

Collecting duct

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

Selective reabsorption

Glomerular filtration

Osmoregulation

Tubular secretion

38. What is the function of glomerular capillaries?

Perform filtration

Secrete hormones

Store waste

Reabsorb nutrients

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

Vasa recta

Alveolar capillaries

Peritubular capillaries

Glomerular capillaries

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

Oxygen

Urea

Glucose

Bicarbonate

41. How is kidney failure commonly treated?

Antibiotics

Dialysis or kidney transplant

Chemotherapy

Vaccination

42. What is the primary nitrogenous waste in humans?

Ammonia

Uric acid

Urea

Creatinine

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

Swelling due to fluid retention

Frequent sneezing

Sweating

Increased lung function

44. What leads to the formation of kidney stones?

Cold temperature

Dehydration

Acid reflux

High vitamin D

45. Which condition may result from prolonged kidney failure?

Jaundice

Asthma

Hyperthyroidism

Anemia

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

Pupil dilation

Vasoconstriction

Sweating

Shivering

47. What is thermoregulation?

Production of hormones

Regulation of blood sugar

Blood pressure control

Maintenance of internal body temperature

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

Glomerular capillaries

Pulmonary capillaries

Peritubular capillaries

Coronary capillaries

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

Tubular secretion

Selective reabsorption

Peristalsis

Glomerular filtration

50. Which hormone increases urine concentration by retaining water?

Glucagon

Insulin

ADH

Thyroxine

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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

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Malik Tahir

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