Practise 16 real Federal Board questions on Homeostasis from 2023 to 2026. See the answer and explanation as soon as you answer.
Homeostasis is one of the 15 main chapters in our Federal Board Matric Biology question bank (10th class), and about 4% of its real questions come from it. Tayyari Karo has 16 real questions on this chapter from 2023 to 2026; 5 are multiple choice and marked instantly, and the rest are short and long questions with a model answer. By difficulty: 12 medium, 4 easy.
Work through the questions below, then open the explanation for each one. Redo the ones you missed a few days later.
These are real past-paper questions. Think of your answer first, then open the explanation.
The main organ of the urinary system responsible for urine formation is:
Answer: B. Kidney
The kidney filters blood and forms urine; the bladder, ureter and urethra only store/transport it.
Which organ filters urea from the blood?
Answer: A. Kidney
The kidneys filter urea and other wastes out of the blood to form urine.
The organ that helps regulate body temperature in humans is:
Answer: B. Skin
The skin regulates body temperature via sweating and adjusting blood flow (vasodilation/vasoconstriction).
The non-surgical method of removal of kidney stone is:
Answer: C. Lithotripsy
Lithotripsy uses shock waves to break kidney stones into small fragments without surgery.
Which of these is NOT present in the filtrate entering the Bowman's capsule of a nephron?
Answer: C. Blood cells
Glomerular filtration is size-selective; large blood cells (and plasma proteins) cannot pass into Bowman's capsule.
What is meant by glomerular filtration in urine formation? Write its process briefly.
Glomerular filtration is the first step of urine formation, in which blood is filtered under pressure at the glomerulus.
Process: blood enters the glomerulus via the wide afferent arteriole and leaves via the narrower efferent arteriole, building up high hydrostatic pressure; this pressure forces water, glucose, amino acids, ions, and urea out of the blood, through the filtration membrane, into the surrounding Bowman's capsule as filtrate, while blood cells and large proteins remain in the blood (too large to pass through).
Explain the three processes involved in urine formation. How does the kidney contribute to maintaining water balance in the body?
1. Glomerular filtration: blood pressure forces water, glucose, amino acids, ions, urea and other small molecules from the glomerulus capillaries into Bowman's capsule, forming filtrate (blood cells and large proteins stay in the blood).
2. Selective reabsorption: as filtrate passes along the tubule (PCT, loop of Henle, DCT), useful substances — glucose, amino acids, most water, needed ions — are actively/passively reabsorbed back into the surrounding blood capillaries.
3. Tubular secretion: certain substances (e.g. excess H⁺, K⁺ ions, some drugs) are actively secreted from the blood into the tubule fluid, to be excreted along with the urine. …
The full model answer is in the app.
Differentiate between Haemodialysis and peritoneal dialysis in detail.
Haemodialysis: the patient's blood is drawn out of the body and passed through an external dialysis machine containing a semi-permeable membrane (artificial kidney), where waste products and excess water/ions diffuse out into a dialysis fluid; the cleaned blood is then returned to the body. It requires vascular access (e.g. a fistula), is usually done a few times a week at a clinic/hospital, and is faster but requires specialised equipment.
Peritoneal dialysis: the patient's own peritoneal membrane (lining the abdominal cavity) acts as the filtering membrane. …
The full model answer is in the app.
| Session | Questions |
|---|---|
| 2026 Annual | 3 |
| 2025 1st Annual | 3 |
| 2025 2nd Annual | 3 |
| 2024 Annual | 4 |
| 2023 Annual | 3 |
16 real Federal Board (FBISE) Biology questions on Homeostasis from 2023 to 2026, for 10th class. Each one shows the session it came from.
No. We could not find an official FBISE marking scheme for these papers, so the answers and explanations are written by Tayyari Karo for practice. Check anything important with your teacher or textbook.
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