NEURONSBasic Units of Basic Units of

the Nervous the Nervous SystemSystem

_________________

- A cell that conducts electrochemical signals

“COMMUNICATIONS SPECIALIST”

STRUCTURE OF A NEURON

DendritesCell BodyAxonButtons(Terminals)

Myelin Sheath andthe Nodes of Ranvier

PARTS/FUNCTIONS

Neurons are held in place by __________ that cleans, nurtures, and supports the neuron.

The

_________________________

- a chemical substance that is released by a transmitting neuron at the synapse and alters the activity of the receiving neuron.

-May excite or inhibit other neurons

EXAMPLE: Seeing colors

How do Neurons Communicate?

NEUROTRANSMISSION

1. SERATONIN:1. SERATONIN: Affects neurons involving sleep, appetite, and mood

2. DOPAMINE:2. DOPAMINE: Affects

neurons involved in

learning, memory,

emotion, and response

Types of Neurotransmitters

Chemical substances in the nervous system that ___________pain & ___________ pleasure.

► Similar to opiate drugs

► Necessary for survival

Chemical substances that affect the

functioning of other organs

1. MELATONIN:1. MELATONIN: Regulates the sleep cycle

2. ADRENAL HORMONES:2. ADRENAL HORMONES: Control emotion & stress

3. ________________:3. ________________: Stimulate the

development of male and female sexual characteristics