The Nervous System Ch.8 of Body Systems
Terms
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- _________ is the name of the nervous system division that includes the nerves that extend to the outlying parts of the body.
- Peripheral Nervous System
- _________ is the name of the nervous system division that includes the brain and the spinal cord.
- Central Nervous System
- A group of peripheral axons bundled together in an epineurium is called a __________.
- Nerve
- The two types of cells found in the nervous system are _________ and _________.
- neurons, glia
- The knee jerk is of a type of neural pathway called a __________ _______.
- reflex arc
- ___________ _________ is a self-propagating wave of electrical disturbance that travels along the surface of a neuron's plasma membrane.
- nerve impulse
- The exterior of a resting neuron has a slight _________ charge, whereas the interior has a slight _________ charge.
- positive, negative
- During a nerve impulse, ________ is the ion that rushes into the neuron.
- sodium
- The __________ is the place where impulses are passed from one neuron to another.
- synapse
- Acetylcholine and dopamine are examples of __________, which are chemicals used by neurons to communicate.
- neurotransmitters
- __________, __________, and __________ are the three membranes that make up the meninges.
- dura mater, arachnoid layer, pia mater
- There are ___ pair of cranial nerves and ___ pairs of nerves that come from the spinal cord.
- 12, 31
- __________ are skin surface areas supplied by a single spinal nerve.
- dermatomes
- __________ is the part of the autonomic nervous system that regulates effectors during nonstress conditions.
- parasympathetic nervous system
- _________ is the part of the autonomic nervous system that regulates the "fight-or-flight" response.
- sympathetic nervous system
- The preganglionic axons of the sympathetic nervous system release the neurotransmitter __________. The postganglionic axons release __________.
- acetylcholine,norepinephrine
- The preganglionic axons of the parasympathetic nervous system release the neurotransmitter _________; the postganglionic axons release ____________.
- acetylcholine, acetylcholine
- The autonomic nervous system consists of neurons that conduct impulses from the brain or spinal cord to _________ tissue, _________ tissue, and __________ tissue.
- cardiac muscle, smooth muscle, glandular epithelial
- Schwann cells
- cells that make myelin for axons outside the CNS
- Astrocytes
- glia cells that help form the blood-brain barrier