Communication Comparison of the nervous and endocrine systems
How does a Nerve Impulse work?
Stimuli are received by receptors
Interpretation of the stimulus to choose an appropriate response
Usually activation of a muscle or gland
How does the message travel in the nervous system? dendrite synapse
Because neurons never touch, chemical signalers called neurotransmitters must travel through thespace called the synapse,between two neurons. Neurotransmitters (pink spheres) The message is transferred whenRECEPTORSreceive neurotransmitters. Synapse (gap)
Response to an external stimulus
Response to an internal stimulus Draw a flow diagram to illustrate this feedback loop
How does the endocrine system work?
A chemical messenger that is secreted into the bloodstream
Cells that have receptors for the hormone
How does the message travel in the endocrine system?
Draw a flow diagram to illustrate this feeback loop
Comparison of endocrine and nervous systems Chemical only Chemical & electrical Hormone Neurotransmitter Through the blood Along the nerves Slow Fast Action lasts a long time Action lasts a short time Lots because it is diluted as it travels through the body A little because it is delivered directly to the place it is needed Any cell with the receptor Nerves, muscles, glands