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What are the first and last elements in a spinal reflex?
The first element in a spinal reflex is the sensory receptor, which detects a stimulus. The last element is the effector, which carries out a response to the stimulus.
What is the pathway of an impulse in a reflex arc?
Sensory receptor, sensory neuron, interneuron, motor neuron, and muscle.
What reflex does a a sensory neuron synapses directly on a motor neuron?
This type of reflex is known as a monosynaptic reflex. It involves a single synapse between the sensory neuron and the motor neuron in the spinal cord, leading to a rapid response to a stimulus without involvement of higher brain centers. An example of a monosynaptic reflex is the knee-jerk reflex.
What is the correct arrangement of a reflex arc?
Receptor → Sensory Neuron → Associative Neuron→ Motor division →Effectors
Where is the relay neurone in the reflex arc?
The relay neuron is located in the spinal cord in a reflex arc. It connects the sensory neuron to the motor neuron, allowing for the reflex response to be processed and carried out quickly without involving the brain.
Which reflex arcs contain no association neuron?
The patellar reflex is an example of a 2-neuron reflex arc. It has 1 sensory neuron and 1 motor neuron. It does not contain an association neuron and so is considered the most simple reflex in humans.
What is the flow of information in a spinal reflex arc in the correct order?
The reflex arc includes the sensory neuron (sensory intake) to the motor neuron (motor response). This two neuron arc is the fastest. Many times an interneuron at the level of the spinal cord is involved. It passes information to the brain more slowly. It is like an "incident report".
What kind of reflex arc does not require an inter neuron?
A monosynaptic reflex arc does not require an interneuron. In this type of reflex arc, the sensory neuron communicates directly with the motor neuron in the spinal cord or brainstem, resulting in a quick and simple reflex response.
What occurs during the reflex arc.?
The pathway that an impulse travels from your foot back to your leg is an example of a reflex arc. A reflex arc includes a sensory receptor (in this case, a receptor in your toe), sensory neuron, motor neuron, and effector (leg muscle). Some reflex arcs include interneurons. In other reflex arcs, a sensory neuron communicates directly with a motor neuron.
Which does not constitute part of a two-neuron reflex?
A two-neuron reflex typically involves a sensory neuron carrying information from a sensory receptor to the spinal cord, where it synapses with an interneuron. The interneuron then synapses with a motor neuron that carries the response signal to an effector organ, such as a muscle or gland. In this pathway, a third neuron would not typically be involved in a two-neuron reflex.
What is the location of an interneuron in a spinal reflex pathway?
Interneurons are located in the spinal cord. They act as the middlemen in transmitting signals between sensory neurons (that detect stimuli) and motor neurons (that generate a response). In a spinal reflex pathway, after receiving sensory input from a sensory neuron, the interneuron processes the information before signaling the motor neuron to carry out a response.
What polysynaptic reflexes have a neuron?
The withdrawal reflex is an example of a polysynaptic reflex involving multiple neurons. This reflex pathway consists of sensory neurons carrying the stimulus information to the spinal cord, interneurons within the spinal cord processing the information, and motor neurons sending signals to muscles to initiate a response, such as withdrawing from a painful stimulus.
