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An autonomic reflex arc is similar to the somatic kind, but differs principally in the motor output side. The sensory side is similar in that a transducer sends a signal via a nerve fiber into the CNS. As with the somatic arc, this sensory fiber is associated with a pseudo-unipolar neuron in a craniospinal ganglion, usually one of the dorsal root ganglia. In the autonomic arc, the sensory transducer is often located in or associated with visceral organs.
Visceral reflex arcs involve involuntary responses in internal organs, modulated by the autonomic nervous system. In contrast, somatic reflex arcs involve voluntary responses in skeletal muscles, controlled by the somatic nervous system.
Everything is essentially the same except that visceral reflex arcs have two neurons in its motor component
Visceral reflex arcs have two neurons in it's moto component.
source - Marieb - AnP 201. P.542
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Which reflex arcs contain no association neuron?
Simple reflex arcs, where a sensory neuron directly synapses with a motor neuron in the spinal cord, do not involve an association neuron. These reflex arcs allow for immediate and involuntary responses to stimuli without the need for processing in the brain. Examples include the knee-jerk reflex and withdrawal reflex.
What kind of reflex uses just two neurons?
The patellar reflex, commonly known as the knee-jerk reflex, uses just two neurons. When the patellar tendon is tapped, a signal is sent along a sensory neuron to the spinal cord, which synapses with a motor neuron to trigger the contraction of the quadriceps muscle and extend the leg.
How might damage to the spine affect a reflex arc?
Damage to the spine can interrupt the transmission of nerve impulses involved in the reflex arc, leading to impaired or absent reflex responses. Depending on the location and severity of the damage, reflexes may be diminished, exaggerated, or completely absent. Physical therapy and rehabilitation techniques may help restore some function in reflex arcs affected by spinal damage.
What is the name given to reflexes that involve more than 2 neurons?
The name given to reflexes that involve more than 2 neurons is polysynaptic reflexes. These reflex arcs consist of multiple interneurons between the sensory and motor neurons, allowing for more complex and coordinated responses.
What is an example of a monosynaptic reflex?
The knee-jerk reflex is an example of a monosynaptic reflex. When the patellar tendon is tapped, sensory neurons directly activate motor neurons in the spinal cord, causing the quadriceps muscles to contract and extend the leg.
Does visceral reflex arcs have two sensory neurons?
No, it has 2 visceral motor neurons. A visceral reflex has a receptor, a sensory neuron, a processing center, and 2 visceral motor neurons.
How do autonomic nervous system reflex arcs work?
ANS reflex arcs are stimulated by input from sensory or visceral receptors. The signals are processed in the hypothalamus (or regions of the spinal cord) and target effector control is then regulated via myelinated preganglionic neurons
What kind of reflex has only two neurons?
monsynaptic reflex arcs
What is reflex arcs?
Please restate this question for clarification...
Which reflex arcs contain no association neuron?
Simple reflex arcs, where a sensory neuron directly synapses with a motor neuron in the spinal cord, do not involve an association neuron. These reflex arcs allow for immediate and involuntary responses to stimuli without the need for processing in the brain. Examples include the knee-jerk reflex and withdrawal reflex.
Why are reflex arcs important?
to protect our body from harmful stuff.
Is reflex action and reflex arcs are same?
Reflexes are uncontrollable movements that happen almost instantly in response to a stimuli. A reflex arc, a neuronal circuit that controls reflexes, is where reflex activities takes place.
Is salivation an automatic reflex?
The withdrawal reflex is both a somatic and autonomic reflex (brain). Withdrawal from a painful stimulus is one test used in brain injury. Without the somatic connection to the autonomic brain areas, you'd have no withdrawal reflex at all when something interferes with that connection (such as brain injury or brain death).
How and why do reflex arcs occur?
A reflex action is an action that happens almost instantly without conscious thought. Grasp a very hot handle of a saucepan on the stove, and you immediately release the handle to avoid further burning by reflex action.
Which of these is not one of the essential compponents of a reflex arc?
The brain is not one of the essential components of a reflex arc. Reflex arcs involve sensory receptors, afferent neurons, interneurons, efferent neurons, and effectors, but they do not involve the brain in the reflex loop.
How is it possible for the GI tract to have complete reflex arcs without having to pass impulses through the central nervous system?
Ganglion
What kind of reflex uses just two neurons?
The patellar reflex, commonly known as the knee-jerk reflex, uses just two neurons. When the patellar tendon is tapped, a signal is sent along a sensory neuron to the spinal cord, which synapses with a motor neuron to trigger the contraction of the quadriceps muscle and extend the leg.
