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Reflexes are rapid involuntary responses to a given stimuli. The reflex pathway that only has one synapse in the CNS is called the monosynaptic reflex arc.
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Why is response time in a monosynaptic reflex much faster than response time in a polysynaptic reflex?
Transmission across a chemical synapse always involves a synaptic delay, but with only one synapse (a monosynaptic reflex), the delay between stimulus and response is minimized. In a polysynaptic reflex, the length of delay is proportional to the number of synapses involved.
Which component of a reflex arc is located entirely within the central nervous system?
Many authors refer to the CNS portion of the reflex arc as the integration center.In regards to a monosynaptic reflex arc, the synapse is the only portion of the integration center.Polysynaptic reflex arcs, have multiple synapses and interneuron(s).
The simplest pathway of an inpulse is what?
A simple reflex arc that only involves two neurons; these are usually found in the digestive system.
What are reflex arcs and reflex actions?
The reflex arc is the nerve pathway that the signal follows. For example, the knee jerk reflex arc has a stimulus going to an interneuron in the spine and a motor neuron completes the arc by causing the knee to jerk. A reflex is just the action itself.
How many synapses are in a polysynaptic reflex arc containing 2 interneurons in the integrating center?
3 because there are regularly 2 synapses when there is only one interneuron. An extra neuron will add an extra synapse.
What is the difference between monosynaptic and polysynaptic?
Monosynaptic refers to a neural pathway involving just one synapse, while polysynaptic involves multiple synapses. Monosynaptic pathways are direct and involve only two neurons, while polysynaptic pathways are more complex and involve multiple relay neurons.
What reflex kicks in if your epiglottis reflex malfunctions?
The coughing reflex kicks in, only if the epiglottis reflex fails to. If the coughing reflex fails then the Heimlich maneuver may be needed.
What kind of reflex has only two neurons?
monsynaptic reflex arcs
The knee jerk reflex is an example of a?
A reflex is a rapid, involuntary response to a stimulus. A reflex arc is the pathway traveled by the nerve impulses during a reflex.Most reflexes are spinal reflexes with pathways that traverse only the spinal cord. During a spinal reflex, information may be transmitted to the brain, but it is the spinal cord, and not the brain, that is responsible for the integration of sensory information and a response transmitted to motor neurons.Information is sent to the brain but that takes awhile longer. It is best if you remove your hand from the fire as fast as possible and not wait until the brain yells "hot, hot!".
What is an automatic response that involves only part of an organism?
A reflex is an automatic response that only involves one part of an organism's body. Examples include the pupillary light reflex, patellar reflex and corneal reflex.
Which quadrilateral does not have a reflex angle?
The only quadrilaterals with a reflex angle are arrowheads (or chevrons).
Why does a reflex nerve pathway move faster than a normal nerve transmission?
Reflex nerve pathway is a monosynaptic transmission. There are no interneurons involved. Only the limb that carries the afferent nerve impulse from the stimulus and the efferent motor function for the reflex involved. That is why it is faster. Normal nerve transmission require an interpretation of the impulse by the brain whereas reflex pathways do not. Another reason is because most reflexes from the exteroreceptors travel along myelinated axons (white matter) which carry the impulse faster than other neurons that have unmyelinated axons (grey matter).
