Chapter 9 of 16 · Biology

Homeostasis

Homeostasis is a Biology chapter on the official PMDC MDCAT 2026 syllabus, contributing roughly 5 MCQs to the 81-MCQ Biology section. Mastering the core concepts below typically secures the full chapter weightage.

Key Concepts

• Kidney structure & nephron
• Osmoregulation
• Thermoregulation
• Excretion in plants
• Negative feedback

How Homeostasis Is Tested

MDCAT questions on Homeostasis are a mix of recall (definitions, classifications), application (predict outcomes, interpret diagrams), and basic numerical/analytical reasoning. PMDC papers from 2020–2025 emphasized the concepts above; older UHS papers (2008–2019) tested them too, with slight variations in question framing.