13.
Together, the gap and the "connecting" membranes between two successive
neurons are called the
. The gap itself is called the
c
t.
Containing specific amounts of neurotransmitter are
c
les in the
terminal bulb of the first neuron. When an impulse reaches the bouton, the vesicles are
stimulated to release their
r. This substance passes through the
c membrane, across the synaptic cleft, and to the
c membrane.
Since this process consumes much energy, the bouton contains many well-developed
.
14.
The neuromuscular junction is the "connection" between a
r neuron and a
s
d
e fiber. It is nearly identical to a
e. However, the surface of
the postsynaptic membrane is in a series of longitudinal
s. This greatly increases
the s
a
receptive to the ACH.
The group of striated muscle fibers innervated by one motor neuron is called the
motor
. Fewer muscle fibers per motor unit result in
r movements. More
muscle fibers per motor unit result in
movements.
15.
The simplest reaction is called a
, defined as an
c reaction to
a stimulus.
16.
A pathway of the human nervous system is the series of neurons or other
structures used to
t an item of information. In general, we consider two
major types of pathways--the general
y pathways and the
r pathways.
At some specific level in the neuraxis, all of these pathways cross to the opposite
side. Each crossing is called a
tion. Thus, the right cerebral hemisphere
communicates with the
half of the body. The left cerebral hemisphere
communicates with the
half of the body.
17.
The general senses include
n,
ch, t
e, and
pro
n ("body
e").
A general sensory pathway extends from the point where the stimulus is received
to the
central gyrus (fold) of the cerebral hemisphere. This gyrus is the site of
conscious sensation of a stimulus.
Corresponding to each location in the body, there is a specific location in the
l gyrus.
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