A gland releases hormone X. Hormone X causes another gland to release hormone Y. Which gland is most likely to have released hormone X?
The adrenal gland, because it releases hormones directly into the stomach.
The pancreas, because it sends electrical impulses to other endocrine glands.
The pituitary gland, because several of its hormones stimulate other glands.
The thyroid gland, because all of its hormones control the pituitary gland.
62 exam-style questions on AQA GCSE Biology 5.3 Hormonal coordination in humans, covering 5.3.1 Human endocrine system, 5.3.2 Control of blood glucose concentration, 5.3.3 Maintaining water and nitrogen balance in the body, 5.3.4 Hormones in human reproduction, 5.3.5 Contraception, 5.3.6 The use of hormones to treat infertility (HT only), and 5.3.7 Negative feedback (HT only). Each one has a worked solution and a mark scheme showing where the marks go.