CNS vs PNS
What does the CNS consist of?
- brain and spinal cord
What does the cell body/soma contain?
Nucleus
Schwann cells are neuroglia found in which part of the nervous system?
PNS
What is the defining feature of a bipolar neuron?
Has 2 dendrites projecting from its soma.
What does the PNS consist of? (be specific)
- 31 spinal nerves and 12 cranial nerves
What is the function of myelin sheaths?
Conducts impulses more rapidly.
Which neuroglia cells make myelin around axons of neurons in CNS?
Oligodendrocytes
What type of nerve impulses do afferent neurons transmit?
- sensory
What does the PNS connect the CNS to? (2 answers)
Muscles and glands on periphery of body
Which structure is the site for neurotransmitter release?
Synaptic terminal
Which neuroglia cells line ventricles of the brain?
Ependymal cells
From where to where do efferent neurons transmit their impulses?
- from CNS to an effector
Which structure allows for saltatory conduction of electrical impulses?
nodes of Ranvier
What is the function of satellite cells?
Support neuron cell bodies within ganglias in PNS
What is the function of an interneuron?
Carry nerve impulses from one neuron to another, make up majority of nerves in body
What is the gap between a presynaptic and postsynaptic neuron called?
- synapse
What is the purpose of the blood brain barrier and which neuroglia cells help form it?
- To regulate what passes from the blood to the brain
- Astrocytes
Which part of the nervous system contains the most interneurons?
CNS