2023TrialMultiple choice
Q19
1 mark
Question
Birds that live in cold environments have a counter-current heat exchange system in their legs, which is shown in the diagram below. The temperature of the blood is lowest at position
(A) A
(B) B
(C) C
(D) D

Syllabus alignment
Module 8 · Non-infectious Disease and Disorders
- HomeostasisInvestigate behavioural, structural, physiological, hormonal, neural and plant water-balance mechanisms.