all nerves outside the CNS which includes cranial nerves and spinal nerves.
any tissue or organ that carries out a nervous system command.
somatic nervous system
voluntarily and its effectors are skeletal muscles. voluntary control.
autonomic nervous system/visceral nervous system
controls smooth muscle, cardiac muscle, and glands, which make up most of the soft body organs, the viscera. Involuntary.
ANS: sympathetic nervous system
Promotes the flight or flight response.
ANS: Parasympathetic nervous system
Stimulates the activity of the digestive tract
neuron fibers that conduct impuleses to the cell body
neuron fibers that conduct impulses away from the cell body.
covered with myelin sheath. found in brain, spinal cord and most nerves throughout the body
sensory neurons/afferent neurons/dorsal
conduct impulses to the spinal cord and brain
motor neurons/efferent neurons/ventral
carry impulses from the CNS out ot muscles and glands
A fiber located with the PNS.
in the brain and the spinal cord, they conduct impulses to and from the brain.
around an individual fiber
around a fascicle
around the whole nerve
contain both sensory and motor fibers.
cells that support and protect the neurons, aid in cell repair, remove pathogens and impurities, regulation composition of fluids around and between cells, nourishment, assist in secretion of cerebrospinal fluid (CSF)
conduct information within CNS
paralysis of one limb
paralysis of both upper or both lower limbs
paralysis of both lower limbs
paralysis of one side of the body
tetraplegia or quadriplegia
paralysis of all four limbs.
receptor of the reflex arc
the end of a dendrite or some specialized receptor cell, as in a special sense organ, that detects a stimulus.
sensory/afferent neuron of the reflex arc
a cell that transmits impulses toward the CNS. Sensory impulses enter the dorsal horn of the spinal cord's gray matter.
CNS of the reflex arc
where impulses are coordinated and a response is organized. One or more inteneurons may carry impulses to and from the brain, may function within the brain, or may distribute impulses to different regions of the spinal cord.
Motor/efferent neuron of the reflex arc
a cell that carries impulses away from the CNS. Motor impulses leave the cord through the ventral horn of the spinal cord's gray matter.
Effector of the reflex arc
a muscle or a gland outside the CNS that carries out a response.