-In this course we focus on neurons:
Approx 100 billion neurons linked via 100 trillion connections!
What is the cell structure of a neuron?
Are there different types of neurons?
What purpose do they serve?
-Key components of neurons:
Contains mechanisms to keep the cell alive
Info is going to come into the cell from other neurons through dendrites
Branch out from the cell body to receive electrical signals from other neurons
Axon (CNS) or nerve fiber (PNS)
Sends info out at the axon
Filled with fluid that conducts electrical signals
-Dendrites: branching fibers with a surface lined with synaptic receptors responsible for bringing information
into the neuron
-Cell body: contains the nucleus, mitochondria, ribosomes, and other structures common to most cells
Also responsible for the metabolic work of the neuron
-Axon: think fiber of a neuron responsible for transmitting nerve impulses toward other neurons, organs, or
The Cells of the Nervous System
-Neurons vary in size, shape, and function
-The function is closely related to the shape of the neuron