| A | B |
|---|
| Two main communication systems | Endocrine and nervous |
| With what does the endocrine system communicate? | Hormones |
| With what does the nervous system communicate? | neurotransmitters and electrical stimuli |
| Major parts of the CNS | brain and spinal cord |
| Major functions of the CNS | communication, coordination, receiving center, interpretation, response, intellect and reasoning |
| structural and functional unit of nervous system | neuron |
| defference between neuron and other cells | neuron has extensions (also called processes or fibers) |
| Names given to the extensions of a neuron. | dendrite and axon |
| The neuron extension that transmits impulses to the cell body. | dendrite |
| The neuron extension that transmits impulses away from the cell body. | axon |
| another name for myelin sheath. | neurilemma |
| Fatty substance produced by the myelin sheath | myelin (white matter) |
| Purpose of myelin | protection (insulation) |
| This would happen if part of the neuron is not myelinated. | short circuit of neurons |
| areas that are not myelinated | gray matter |
| These cells contribute to the blood-brain-barrier | astrocytes |
| These cells make the myelin sheath in the CNS | oligodendrocytes |
| These cells make the myelin sheath in the ANS | Schwann cells |
