Human anatomy and physiology chapter 8 nervous system
vocabulary and concepts
Terms in this set (42)
central nervous system
consist of the brain and spinal cord, integrates and coordinates input and output
peripheral nervous system
all neural tissues outside of the CNS, connection between the CNS and the organs
where information is processed , includes sensory receptors(sensory information detected outside the nervous system), neurons that send information to the CNS
where CNS sends motor commands, includes neurons that send information to the effectors which are the muscles and glands
somatic nervous system (SNS) (efferent division)
controls skeletal muscle
autonomic nervous system (ANS) (efferent division)
controls smooth and cardiac muscle, and glands
sympathetic division (ANS division)
example: acceleration, fight or flight
parasympathetic division (ANS division)
example: slows heart rate, etc.
cells that communicate with one another and other cells
basic structures of the neuron are the following:
cell body, dendrites, axons, axon terminal
carries signals to the next cell
bulb-shaped endings that form a synapse with the next cell
a small gap at the end of a neuron that allows information to pass from one neuron to the next
the nervous system reaction is...
fast and short
the endocrine system reaction is...
slower and long lasting
both systems coordinate organs to...
nervous system steps..
sensory input, integration, motor output
where electrical signals begin
structural classifications of the neurons: multipolar, bipolar,unipolar:
multipolar= multi dendrites and 1 axon, Bipolar= 1 dendrite and 1 axon, unipolar= most abundant in afferent division, 1 dendrite
sensory neurons/afferent neurons
receive info from sensory receptors
all or none
refers to the fact that the action potential in the axon occurs either full blown or not at all
motor neuron/ efferent neuron
carry info to peripheral targets called effectors
located in CNS function as links between sensory and motor processes
supportive cells making up about half of all neural tissues
types of neuroglial cells in CNS
astrocytes, oligodentrocytes, microglia, ependymal cells
types of neuroglial cells in PNS
satellite cells, and schwann cells
produce myelin, surface in the neurilemma, cover every axon in PNS
collection of nerve cell bodies
the sending neuron
the receiving neuron
neurons cant divide because...
the lack a centriole
connection between the left and right hemisphere
vision occurs in...
muscle memory and fine motor skils
region of the brain responsible for heart rate, respiratory rate, and pressure
where the postganglionic neuron releases epinephren into the blood
the neural tissue in the CNS is protected by 3 layers of specialized membranes: dura mater, arachnoids, pia mater
outer very tough covering
is seperated by dura mater by the subdural space
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