nervous system organization Flashcards
is efferent motor or sensory
motor
is afferent motor or sensory
sensory
what is the difference btw visceral and somatic
somatic is conscious and voluntary movements whereas visceral is unconscious and unvoluntary
what is the imput receiving portion called
dendrites
what are the three main functions of the nervous system
sensory function, integrative function and motor function
what does sensory function do
detect internal and external stimuli and carries info to the brain via sensory neurons
what does integrative function do
processes sensory info, analyzing and making decisions regarding appropriate responses and this is done by interneurons
what does motor function do
responds to integration decision, neurons that serve this function are motor (efferent) neurons, carry info out of the brain and spinal cord
sensory info goes through what in the spinal cord
exits through the dorsal root
the central nervous system controls which structures
brain and spinal cord (connects the brain to the rest of the body)
the peripheral nervous system controls divides into what 2 subdivisions
the autonomic division and the somatic division
what does the autonomic division regulate
it regulates the internal environment and so it carries the info from the CNS to organs, blood vessels and glands
what does the somatic division regulate
carries info to the CNS from the senses and from theCNS to the skeletal muscles (only these and nothing else)
the autonomic division splits into what 2 subdivisions
sympathetic (arouses the body) and parasympathetic (calms after arousal)
what system includes the brain and spinal cord and is the control center for the entire ns
central nervous system
what system processes and integrates sensory info as well as plans and coordinates responses to stimuli and provides short term control over activities of other systems
central nervous system
what system is neural tissue outside the cns and links it to sense organs and other systems
peripheral nervous system
what system has nerves that have an efferent and afferent division as well as has cranial n emerging from the brain and spinal n emerging from the sc
peripheral nervous system
the efferent portion of the pns is subdivided into what 2 systems
somatic ns and autonomic ns
the sns controls what
skeletal m contractions (voluntary and involuntary)
sensory neurons convey info from cutaneous and special senses where
primarily in the head, body wall and extremities
motor neurons from the cns conduct impulses where
to skeletal muscles ONLY
which system only has 1 continuous neuron
sns
the ans controls what
visceral function
regulates smooth m, cardiac m. and glandular activity
