Nervous System I: Anatomy Review
1. Neurons communicate with other neurons and stimulate both MUSCLES and GLANDS.
2. Match the following parts of the neuron and their function:
AXON-conductive region; generates an action potential
DENDRITES- input area; receives signals from other neurons
SOMA-input area; main nutritional and metabolic area
3. Signals from other neurons are received at junctions called SYNAPSES, located primarily on the CELL BODIES and DENDRITES, the receptive and integrative regions of the neuron.
4. The area where the axon emerges from the soma is called the AXON HILLOCK.
This is also the area where the outgoing signal, called a/an ACTION POTENTIAL is generated.
5. An axon can branch, forming axon COLLATERALS.
At their end, axons branch to form many axon TERMINALS.
6. What support cell type forms the myelin sheath? SCHWANN
Myelin is found around which part of the neuron? THE AXON
The tightly wound cell membrane around the axon forms the myelin sheath and acts as PROTECTION, IT ELECTRICALLY INSULATES.
7. The gaps between the Schwann cells, called the NODES OF RANVIER, are essential for the conduction of the action potential.
8. The most common central nervous system neuron, is called a/an MULTIPOLAR neuron.
9. Neurons have (only one) axon/axons.
Axons are (frequently) branched.
Dendrites have (many) branch/branches.
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