Nervous System Overview Flashcards
What does the grey matter of the brain and spinal cord consist of?
Cell bodies
What does the white matter of the brain and spinal cord consist of?
Axons that form tracts (pathways)
At what vertebra does the spinal cord end?
L1-L2
What is a mixed nerve that carry motor, sensory and autonomic signals between the spinal cord and the rest of the body.
Spinal nerve
What are the two divisions of the nervous system?
The central nervous system and the peripheral nervous system
What are the two divisions of the peripheral nervous system?
Autonomic nervous system and somatic nervous system
What does the autonomic nervous system communicate with?
Communicates with internal organs and glands
What does the somatic nervous system communicate with?
Sense organs and voluntary muscles
What are the two divisions of the autonomic nervous system?
Sympathetic and parasympathetic
Does the sympathetic division of the autonomic nervous system have an arousing or calming effect?
Arousing
Does the parasympathetic division of the autonomic nervous system have an arousing or calming effect?
Calming
What are the two divisions of the somatic nervous system?
Sensory (afferent) and motor (efferent)
What is primary structure is the somatic nervous system derived from?
Somites
What embryonic structure is the central nervous system derived from?
From the neural tube
What embryonic structure does the peripheral nervous system derive from?
Developed from neural crest and CNS outgrowths
What is the general function of somatic nerves?
Receive information from and responds to external world