SORU: aşağıdaki parçaya göre cevaplayınız
According to the passage, although most of our body is thoroughly equipped with pain receptors, ----.
Pain is a signal that protects us from harmful stimuli.
An excess of any type of stimulus such as pressure,
heat, cold, excessive mechanical stretch, and
specific chemical compounds stimulates pain
receptors. In the human body, pain receptors are the
tips of certain sensory neurons found in almost every
tissue. However, most internal organs are poorly
supplied with pain receptors. For this reason, pain
from internal structures is often difficult to locate. In
fact, pain is often not projected back to the organ that
is stimulated. Instead, it is referred to an area just
under the skin that may be some distance from the
organ involved. The area to which the pain is referred
is connected to nerve fibres from the same level of
the spinal cord as the organ involved.