yr13 hormonal control

Question 1

what are endocrine glands

Answer 1

secrete hormones directly into the blood

Question 2

what are exocrine glands

Answer 2

secrete molecules into a duct that carries secretion to another place e.g. salivary gland

Question 3

what are hormones

Answer 3

chemical messenger that acts on tissues or organs, secreted when endocrine gland is stimulated due to another hormone/nerve impulse

diffuse directly into bloodstream and bind to receptors on target organs/cells which trigger a response in target cells using secondary messengers