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11 Cards in this Set

  • Front
  • Back
What comprises the central nervous system?
The brain and the spinal cord.
Which part of the spinal cord do the motor neurons come out of?
The dorsal side.
Which part of the spinal cord do the sensory neurons go into?
The ventral side.
What are glia?
The non-neuron part of the CNS, which are now known to be important in processing and such.
What does grey matter consist of?
Neurons, glia, and synapses.
What does white matter consist of?
Nerve fibers (axons) and glia.
What do dendrites do?
Receive the signal from other neural cells and transmit it to the cell body.
What does the axon hillock do?
Connects the axon to the cell body.
What do Schwann cells do?
They compose the myelin sheath, which insulates the axon.
What do the Nodes of Ranvier do?
They expose the axon to the extracellular fluid periodically. The signal "jumps" between these nodes.
Which ion are cells more permeable to, sodium or potassium? What effect does this have on membrane potential?
Potassium. It makes the membrane potential negative as potassium can leak out more than sodium can leak in.