18.
Pain is an ancient protective mechanism which generally helps us to avoid
y. Endorphins are chemicals found naturally within the body which tend to
block the sensation of
.
The pain receptor is not a specific receptor organ. It is referred to as a _____
nerve ending.
19.
The body has two different mechanisms for sensing temperature. Detecting
warmth and cold in the periphery of the body are specific sensory
s.
Special heat-sensitive neurons in the hypothalamus detect increases in the temperature
of the
.
20.
The pacinian corpuscles are typical of the receptors which detect
p
re.
21.
Another term for muscle sense is p
n. For this, there is a special
receptor organ to monitor the
h of the muscle. These receptor organs are called
muscle s
s or s
h receptors. They detect relative muscle l
.
Another stretch receptor associated with the skeletal muscle is the
i
n
organ. As its name implies, this organ is located within the
of the muscle. It
detects relative muscle t
.
22.
The CNS receives information through the
pathways and collates this
information against information stored in
. This results in a
n. If the
decision is to do something, then the CNS sends out commands through the ______
pathways to the
r organs.
23.
We usually consider two general motor pathways--the
dal and the
e
dal motor pathways.
24.
A pyramidal motor pathway is primarily concerned with
ional (
ary)
control of body parts, particularly with the fine movements of the
s.
The pyramidal motor pathway begins in the p
l gyrus of the cerebral
hemisphere. As we have already seen, the neurons making up the precentral and
postcentral gyri are arranged in a pattern corresponding to the various
ts of the
body to which they are connected.
MD0007
12-29
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