Hormone P travels in the blood to organs X and Y. Only organ Y responds.
Which statement explains this result?
Only X contains cells with receptors for P.
Only X contains cells that manufacture hormone P.
Only Y contains cells with receptors for P.
Only Y contains cells that manufacture hormone P.
42 exam-style questions on Edexcel GCSE Biology 7.1 Hormones and coordination, covering 7.1.1 Endocrine glands and hormone transport, 7.1.2 Adrenalin and fight or flight, and 7.1.3 Thyroxine and negative feedback. Each one has a worked solution and a mark scheme showing where the marks go.