Nerve cells neurotransmission
Download
1 / 13

Nerve Cells & Neurotransmission - PowerPoint PPT Presentation


  • 124 Views
  • Uploaded on

Nerve Cells & Neurotransmission. The Brain :. Made up of millions of nerve cells called neurons. Neuron contains 3 Parts:. Dendrites:. Receive message. Axon. Transmits messages from the cell body to other dendrites or body tissues (muscles). Cell Body.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Nerve Cells & Neurotransmission' - dinos


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
Nerve cells neurotransmission

Nerve Cells & Neurotransmission


The brain
The Brain:

  • Made up of millions of nerve cells called neurons



Dendrites
Dendrites:

  • Receive message


Axon

  • Transmits messages from the cell body to other dendrites or body tissues (muscles)


Cell body
Cell Body

  • Directs all activities of the neuron


Neurotransmission
Neurotransmission

  • Transfer of a message from the axon of 1 nerve cell to the dendrites of another.

  • Does not have direct contact



Communication between nerve cells
Communication between nerve cells:

  • Occurs through the release of chemical substances (neurotransmitters) into the space between the axon & dendrite (synapse)


When neurons communicate
When Neurons communicate:

  • A message (electrical impulse) travels down the axon to the synapse

  • This triggers the release of neurotransmitters into the synapse


Neurotransmitters chemical messengers
Neurotransmitters (chemical messengers)

  • Diffuse across the synapse

  • Bind to receptors

  • This stimulates (starts) or inhibits (stops) an electrical impulse in the receiving neuron’s dendrites.


Neurotransmitters
Neurotransmitters

  • Very specific

  • Like a lock & key

  • Reusable


Myelin
Myelin:

  • Fatty substance

  • Covers axons

  • Increases rate of conduction (how fast the message travels)

  • 120 meters/second verses 2 meters/second


ad