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.
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.
The monosynaptic reflex, such as the knee-jerk reflex, has the least synaptic delay because it involves only one synapse between sensory and motor neurons in the spinal cord. This direct connection allows for a rapid response to a stimulus.
A simple reflex arc that only involves two neurons; these are usually found in the digestive system.
The most simple nervous system pathway is the monosynaptic reflex arc. It involves only two neurons: a sensory neuron that detects a stimulus and a motor neuron that responds to the stimulus by causing a muscle to contract. This pathway allows for rapid and automatic responses to stimuli, such as when you touch something hot and quickly pull your hand away.
3 because there are regularly 2 synapses when there is only one interneuron. An extra neuron will add an extra synapse.
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.
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 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.
monsynaptic reflex arcs
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.
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!".
A simple reflex involves a direct pathway that includes only a sensory neuron and a motor neuron, resulting in an immediate, involuntary response to a stimulus, such as the knee-jerk reflex. In contrast, a complex reflex involves multiple neurons and often includes interneurons, allowing for more intricate processing and integration of information, which can lead to a more coordinated response, such as withdrawal from pain. Simple reflexes are typically faster and more straightforward, while complex reflexes can involve higher brain functions and emotional responses.