Biology Questions and Answers
example of the arch reflex occurs when
someone steps oleg retracts and the other, by the archn a sharp object: one (^)
reflex, distends to maintain the
equilibrium of the body.
- Which are the types of
neurons that participate in the
spinal arch reflex? Where are
their cell bodies situated?
In the arch reflex first a sensory neuron
located in the ganglion oroot collects the stimulus inf a dorsal spiformation nal
from the tissues. This sensory neuron
makes direct or interneurons) conindirect (throughnection with inferior (^)
motor neurons of the spinal cord. These
motor reaction. So seneurons then commannsory neurons,d the reflex
interneurons and inferior motor neurons
participate in the arch reflex.
- What are the respective
constituents of the gray
matter and of the white
matter of the spinal cord?
The gray matter, or gray substance, of
the spinal cord coneuron bodies (inferior motor ntains predominantlyneurons, (^)
secondary sensory neurons and
interneurons). Thmainly made of axons that cone white matter isnect (^)
neurons of the brain with spinal
neurons.
- Is the neural impulse
generated by the stimulus
that triggers the arch reflex
restricted within the neurons
of this circuit?
The sensory arch reflex confiber that first connects with neurons of theducts the (^)
arch reflex but it also connects with
secondary scord that transmitensory n information upeurons of the spinalwards
to other neurons of the brain. This is
obvious since the initial stimulusthe person that received (e.g., the percussion (^)
on his/her kneecap) perceives it
(meaning that thconscious of the fact).e brain became
- How is it explained that a
person with the spinal cord
sectioned at the cervical level
is still able to perform the
patellar reflex?
The arch reflex depends only on theintegrity of the fibers at a single spinal (^)
level. In the arch reflex the motor
response to thand involuntary ae stimulus is automaticnd does not depend
upon the passage of information to the
brain. So cord is damait happens even if the spinalged at other levels.
- How does poliomyelitis
affect the neural transmission
in the spinal cord?
The poliovirspinal motor nus parasiteseurons causin and destroysg paralysis (^)
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