1Biologytemperature regulation
When the temperature of the body surrounding rises, baby responds by
- A.Vasoconstriction
- B.Vasodilation
- C.Shivering
- D.Raising body hairs
Answer and explanation locked
Homeostasis MCQs for MDCAT
4 Homeostasis questions from real MDCAT past papers (2020), each with the correct answer and a written explanation.
4 questionsBiology
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2Biologyurine concentration
The excretion of hypertonic urine in humans is associated best with the
- A.Glomerular capsule
- B.Proximal convoluted tubule
- C.Loop of henle
- D.Distal convoluted tubule
Answer and explanation locked
3Biologythermoregulation
In humans, the temperature regulation control conter is located in
- A.Kidneys
- B.Brain
- C.Lungs
- D.Liver
Answer and explanation locked
4Biologyhormonal control of sodium
The active uptake of sodium in the ascending limb or thick loop of henle is promoted by the action of
- A.Aldosterone
- B.Thyroxine
- C.ADH
- D.Cortisone
Answer and explanation locked
How Homeostasis is examined
Homeostasis sits in the official PMDC Biology curriculum, the document that defines what can and cannot appear in the 2026 paper. Everything on this page is tagged against that curriculum rather than against a chapter list invented for a website, which is why a chapter here matches the chapter your textbook and your teacher use.
Biology carries 81 of the 180 questions in the real paper - 45% of your MDCAT score, and the MDCAT is half your merit aggregate. PMDC does not publish how those 81questions are split across chapters, so no honest page can tell you “expect four from Homeostasis”. What the archive can tell you is what actually appeared: 4 Homeostasis questions out of the 77 Biology questions digitised so far.
Work through them with the explanations rather than checking answer letters. The explanation says why the other three options are wrong, and distractors get reused across years far more reliably than whole questions do.
Frequently asked questions
How many Homeostasis MCQs are on this page?
4, drawn from one past paper - the 2020 paper. Every one is transcribed from the real paper rather than written to look like a past paper question, and each carries the correct answer with a written explanation. 0 of them are readable in full without an account.
Is Homeostasis in the MDCAT 2026 syllabus?
Yes. Homeostasis is a chapter of the official PMDC Biology curriculum, and PMDC has confirmed the 2026 syllabus is unchanged from the 2025 revision, so everything on this page is still examinable.
How many Homeostasis questions come up in the MDCAT?
PMDC does not publish a per-chapter breakdown, so nobody can tell you a reliable number - be careful with pages that do. What can be counted is the paper as a whole: Biology is 81 of the 180 questions, and 5% of the Biology questions in our archive so far have come from Homeostasis.
Do these Homeostasis MCQs come with explanations?
Yes, and they are written from scratch rather than copied. An answer letter tells you nothing about why the other three options are wrong, which is the part that transfers to the next question. The first 0 questions of every paper are free to read in full; the rest need a pass.