Hormones M and N are released by endocrine glands and circulate in the blood. Heart cells contain receptors for hormone M but do not contain receptors for hormone N.
Which conclusion can be made from this information?
The heart is a target organ for both hormones because both reach it in the blood.
The heart is a target organ for hormone M but not for hormone N.
The heart is not a target organ because it does not secrete either hormone.
The heart is a target organ only for the hormone from the gland closest to it.
89 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.