5.3.1: Human endocrine system
Not started yet — this one needs some love.
The endocrine system is made of glands that secrete chemicals called hormones directly into the bloodstream.
The blood carries hormones to target organs, where they produce an effect.
Compared with the nervous system, hormonal effects are slower but act for longer.
The pituitary gland in the brain is a master gland that secretes several hormones in response to body conditions.
Pituitary hormones can act on other glands and stimulate them to release hormones.
Endocrine glands to identify on body diagrams include the pituitary gland, pancreas, thyroid, adrenal gland, ovary and testes.
Common exam mistakes
Do not say hormones travel along neurones; they are carried in the blood.
Hormones affect target organs, not every cell equally.
The pituitary gland is in the brain, while the thyroid, adrenal glands, pancreas, ovaries and testes are in different body regions.
Comparisons with nervous coordination need comparative wording, such as slower and longer-lasting.