Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
NERV: Overview
Nervous system overview.
| Question | Answer |
|---|---|
| CNS components | brain and spinal cord |
| PNS Components | cranial nerves, spinal nerves, peripheral nerves |
| Efferent neurons | Nerve cells that conduct impulses away from the central nervous system aka motor neurons |
| afferent neurons | Nerve cells that carry impulses towards the central nervous system aka sensory neurons |
| autonomic nervous system | controls self-regulated action of internal organs and glands |
| somatic nervous system | controls voluntary movements of skeletal muscles |
| sympathetic nervous system | the division of the autonomic nervous system that arouses the body, mobilizing its energy in stressful situations |
| parasympathetic nervous system | the division of the autonomic nervous system that calms the body, conserving its energy |
| neuron | a nerve cell; the basic building block of the nervous system |
| dendrites | Branchlike parts of a neuron that are specialized to receive information. |
| axon | the neuron extension that carries impulses away from the cell body |
| terminal end fibers | the branching fibers at the end of the axon that lead the nervous impulse from the axon to the synapse |
| glial cells | cells in the nervous system that support, nourish, and protect neurons |
| myelin sheath | covers the axon of some neurons and helps speed neural impulses |
| myelinated nerve fibers | white matter, have myelin sheath, faster nerve conduction |
| unmyelinated nerve fibers | gray matter, lacking myelin sheath, slower nerve conduction |
| synapse | the junction between the axon tip of the sending neuron and the dendrite or cell body of the receiving neuron |
| neurotransmitters | chemical messengers that cross the synaptic gaps between neurons |
| nerve | one or more bundles of neurons that connect the brain and the spinal cord with other parts of the body |
| nerve tract | bundle of nerve fibers in brain or spinal cord |
| ganglion | A cluster of nerve cell bodies, often of similar function, located in the PNS. |
| plexus | large, interlacing network of nerves |
| innervation | the supply of nerves to a specific body part |
| stimulus | any event or situation that causes an impulse |
| receptors | Special structures that allow living organisms to sense the conditions of their internal or external environment. |
| connecting neurons | associative neurons which link sensory and motor neurons within the CNS |
| reflexes | automatic, involuntary responses to stimuli inside or outside of the body |
Created by:
jfoote
Popular Physiology sets