B12: Homeostasis, Thermoregulation and Osmoregulation
Official Cambridge & Imperial ESAT specification requirements for Homeostasis, Thermoregulation and Osmoregulation on the Biology paper. Understand the syllabus boundaries, spot distractor traps engineered by examiners, and master the 2-step Sub-90 shortcuts that compress solve time well below the 88.8-second cutoff.
Official Syllabus Subtopics
Requirements specified in the UAT-UK framework
- 1Negative feedback mechanisms and homeostatic control loops (receptors, coordination centers, effectors)
- 2Thermoregulation: dermal capillary vasodilation and vasoconstriction, shivering thermogenesis, sweating evaporation
- 3Blood glucose regulation: islets of Langerhans, beta cell insulin secretion, alpha cell glucagon secretion, liver glycogen storage
- 4Osmoregulation and renal physiology: ADH feedback, collecting duct aquaporin permeability, loop of Henle countercurrent multiplier
- 5Type 1 vs Type 2 diabetes pathology and glucose clearance curves
Sub-90 Exam Speed Tips
How top candidates solve this spec under the 88.8s clock
Look out for percentage hydration traps: remember negative feedback always acts to oppose the initial displacement.
ADH increases water reabsorption in the collecting duct; high blood solute concentration triggers ADH secretion from the posterior pituitary.
Examiners engineer distractor options using common algebraic expansions and sign slips. Always test structural ratios or invariants before calculating arithmetic values.
Tested Topics in Specification B12
Master the individual question patterns and Sub-90 shortcuts for this specification.
Topics for Specification B12 are foundational to Biology. Practice multi-topic questions in the full module mock.
Ready to Master Specification B12 Under Exam Conditions?
Practice timed questions under the authentic Pearson VUE interface with live split stopwatch pacing, dry-wipe scratchpad, and distractor forensics.