click below
click below
Normal Size Small Size show me how
Spring Quiz 1
Masterbooks Intro to A&P Volume 3
Term | Definition |
---|---|
sensory functions | a vast number of sensory receptors throughout the body provide input to the nervous system |
motor output | simply what the body is told to do as a result of all this information input and processing |
central nervous system | composed of the brain and the spinal cord |
the brain | the master control center of the nervous system |
peripheral nervous system | portion of the nervous system outside of the central nervous system |
sensory division | carries information from the skin and muscles as well as from the major organs in the body to the central nervous system |
afferent division | another name for sensory division, and meaning "bringing toward" because it carries nerve impulses "to" or "toward the CNS |
motor division | carries instructions from the CNS out to the body |
somatic nervous system | instructions that are carried by the motor division and taken to muscles that we can consciously control |
autonomic nervous system | the part of the motor division that controls the involuntary functions |
neurons | the excitable nerve cells that transmit electric signals |
stimulus | excites a neuron, triggering an electrical signal called an action potential |
neuroglia | cells in nervous tissue that help protect and support the neurons |
neurotransmitters | the chemicals that transmit an electrical impulse from one neuron to the next |
dendrites | parts of neurons that receive inputs, and when received, an electrical signal is generated and transmitted toward the cell body |
axon terminals | where neurotransmitters are released to carry the neuron's signal on to the next cell in line |
multipolar neurons | most common type; have one axon and multiple dendrites |
bipolar neurons | have only two processes: one axon and one dendrite |
unipolar neurons | have a more unusual configuration with only one process extending from the cell body |
interneurons | means "between neurons"; carries impulses from one neuron to another within the central nervous system |