A-LevelBiologyControl and coordinationOct/Nov 2025Paper 4 Q513 Marks
The endocrine system and the nervous system both coordinate responses in mammals. (a) Complete Table 5.1 to show the features of three cell-signalling molecules of the endocrine system: antidiuretic hormone (ADH), glucagon and insulin. Use a tick (✔) if the molecule has the feature and a cross (X) if the molecule does not have the feature. Put a tick (✔) or a cross (X) in every box. Table 5.1 feature ADH glucagon insulin binds to receptors on cell surface membranes results in molecules moving from cells into the blood is secreted as a result of detection by osmoreceptors
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
🎯 Mark Scheme Breakdown
Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.
🔒
Unlock the Examiner's Analysis
Sign up for free to reveal the full examiner report, trap analysis, and mark scheme breakdown for this question.
Sign Up Free to Unlock →Join thousands of Cambridge students already using Oracle Prep