Chapter 1: cells and structures: the anatomy of the Nervous system Flashcards
define:
Neuron
The basic unit of the nervous system
Answer:
How many functional zones
4
define:
Input zone
where neurons collect and process information, either from environment or from other cells
Define:
Integration Zone
where the decison to produce a neural signal is made
Define:
conduction zone
where information can be electrically transmitted over great distances
define:
Output zone
where the neurons transfers information to other cells
Describe:
Multipolar neuron
one main axon and several dendrites
Answer
where is the most common place to find multipolar neurons
brain/spinal cord
Describe:
Bipolar neuron
One axon exenstion to dendrite
define:
unipolar neurons
axon on one side the dendrite on one side. (the cell body is connected like a tumor)
Describe:
motor neurons
3 points
- output allows us to do “stuff”
- multipolar long axons
- track going down (rene decartes)
Define:
sensory neurons
2 points
- senses
- track going down (rene decartes)
Define:
Interneurons
2 points
- small axons
- analyze inputs
mostly in the brain
Answer:
what is the neurons job?
recieve and transmit information
Answer:
approximately how many neurons are in the human brain?
~ 100 billion
