University:
York University
Course:
BIOL 2020 | Biochemistry
Academic year:

2023
Views:

315

Pages:

1
Author:

Nick T.

Chemical Messengers Coordination of body functions is accomplished by Chemical messenger molecules *Messenger molecules can be hormones or neurotransmitters *Messenger molecules Signals from one location to a target location Hormones are produced by the endocrine system. Released from glands & pass to target cells through blood Neurotransmitters are produced by the nervous system. They are released from nerve cells and pass from one nerve cell to other nerve or muscle cells Many chemical messengers can act as both hormones & neurotransmitters. Many drugs act by mimicing the action of chemical messengers Hormones *Secreted by endocrine system + transported thru bloodstream *Endocrine system = specialized cells, tissues and ductless glands that secrete hormones *Shares responsibility with nervous system *Hypothalamus Controls hormone Secretion Neurotransmitters *Secreted by nervous system *Transported thru synaptic cleft *Nervous system = brain, spinal cord & nerves *Fast acting, short lived signals