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BIOL 235- Chapter 15 exam questions and answers
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BIOL 235- Chapter 15 exam questions and answers
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BIOL 235- Chapter 15 examquestions and answers
Somatic Nervous System - answer Portion of the
PNS consisting of somatic sensory (afferent)
neuros and somatic motor neurons (efferent).
Interoceptors - answer Sensory receptor located
in blood vessels and viscera that provides
information about the bodies internal environment
ex)
Chemorecpetors, mechanoreceptors
Autonomic Motor Neurons - answer Regulate
visceral activities by either increasing (existing) or
decreasing (inhibiting) ongoing activities in the
effector tissues.
ex)
Change in the diameter of pupils,
dilation/constriction of blood vessels.
Autonomic Motor pathway - answer 2 motor
neurons in series.
,1st has cell body in CNS, myelinated axon extends
from the CNS to autonomic ganglion.
2nd cell body is in the same autonomic ganglion to
the effector, unmyelinated axon extends directly
from ganglion to the effector.
Autonomic Ganglion - answer A cluster of cell
bodies of sympathetic or parasympathetic neurons
located outside the CNS.
Sympathetic Division - answer Fight or Flight
response
It is a response to physical activity, emotional
stress. These activities result in an increase
alertness and metabolic activities in order to
prepare the body for an emergency.
Parasympathetic Division - answer Rest and
Digest response
The activities conserve and restore body energy
during times of rest and digesting a meal. Majority
of output is directed to smooth muscle and
glandular tissue.
Conserves energy and replenishes nutrient stores.
, Dual Innervation - answer Organs receive
impulses form both sympathetic and
parasympathetic.
Preganglionic Neurons - answer The first
autonomic motor neuron in an autonomic pathway,
with its cell body and dendrites in the brain or
spinal cord and its myelinated axon ending at
autonomic ganglion, where it synapses with a
postganglionic neuron.
Thoracolumbar Division - answer The
preganglionic neuron cell bodies are in the lateral
horns of the gray matter in 12 thoracic and the
first 2 lumbar segments.
Thoracolumbar outflow - answer Axons of
sympathetic preganglionic neurons, there cell
bodies in the lateral gray columns of the thoracic
segments and first two of three lumbar segments
of the spinal cord.
Craniosacral division - answer Cell bodies of the
preganglionic neurons of the parasympathetic
division are located in the nuclei of four cranial
nerves in the brain stem (III< VII< IX< X) and in
the lateral gray matter of the second through 4th
sacral segments of the spinal cord.
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