synaptic transmission & endocrine system

Excitation (ST)

some neurotransmitters make the post-synaptic cell more likely fire (adrenaline)

Inhibition (ST)

Some neurotransmitters make the post-synaptic cell less likely to fire (serotonin)

Endocrine system

One of the body’s major information systems that instructs glands to release hormones directly into the bloodstream

Gland

An organ in the body that synthesises substances such as hormones.

The ovaries

Secrete oestrogen which triggers the release of an egg

The pineal gland

Releases melatonin when it is dark which induces sleep

The adrenal gland (adrenal medulla)

Releases adrenaline which activates the fight or flight response

Hormones

Chemical substances that circulate in the bloodstream and regulate bodily processes and stimulates cells and tissue into action, their effects on behaviour can be very powerful

Homeostasis

The maintenance of a constant internal environment within the body