Answer Happy

Usually, spinal cord injury or disease produces both
sensory and motor deficits. An exception is an infection by the
poliomyelitis virus, which produces weakness and paralysis without
loss of sensation in the affected extremities.
A. Explain, using the information on the cell column
organization of the spinal cord.
4. The functions of the sympathetic nervous system are
often described in relation to the “fight-or flight” response.
Using this description, explain the physiologic advantage of the
following distribution of sympathetic nervous system
receptors:
A. The presence of ß2 receptors on the blood vessels
that provide blood flow to the skeletal muscles during “fight or
flight,” and the presence of a1 receptors on the resistance vessels
that control blood pressure
B. The presence of acetylcholine receptors on the sweat
glands that allow for evaporative loss of body heat during “fight
or flight,” and the presence of a1 receptors that constrict the
skin vessels that control blood flow to the skin
C. The presence of ß2 receptors that produce relaxation
in the detrusor muscle of the bladder during “fight or flight,” and
the presence of a1 receptors that produce contraction of the smooth
muscle in the internal sphincter of the bladder.
Please add references.