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Last step of a reflex arc?
PNS delivers motor response from CNS to effectors...
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).
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.
Are Efferent neurons are the most abundant type of neuron?
Interneurons make up about 99% of all neurons. They are all in the CNS.
What cells make up the mylin sheath?
There are two cells that are involved in the myelin sheath. One type is found in the central nervous system (CNS) and the other is in the peripheral nervous system (PNS).These are the oligodendrocytes (CNS) and Schwann cells (PNS).
A reflex pathway having only one synapse in the CNS?
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.
The simplest level of CNS function is the?
Spinal Reflex
What is the only thing complete within the CNS from the reflex arc?
only the Interneuron
Last step of a reflex arc?
PNS delivers motor response from CNS to effectors...
What is the processing center of a visceral reflex?
is a mediated in a manner similar to the knee jerk reflex: activation of the receptor, transmission of a sensory information to the CNS, the processing of the information by the CNS, and the motor response sent to the effector organ.
Similarity between cardiac and smooth muscle?
Both can work independently without signal from the CNS
What is the jump reflex?
Jump reflection is a a reflex action that takes place under the control of spinal cordand not the involvement of CNS. Eg. When we stamp on a nail or on an hot plate we immediately move the leg because of reflex action.
What is a somatic reflex and how does it occur through the CNS?
A somatic reflex is where the body responds to stimulus. The message from the stimulus is sent through the central nervous system via the spine, and from there it travels to the brain.
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).
Define reflex arc and list its elements?
A Reflex Arc is a neural pathway for reflexes that is involved in CNS and PNS. The five elements are: 1. Sensory receptor (Reacts to stimuli) 2. Sensory or Afferent neuron (takes information to the CNS) 3. Integration Center (Spinal Cord or Brain processes information) 4. Motor or Efferent neuron (carries signal away from CNS) 5. Effector organ (muscles or glands)
What type of precuation is needed with CNS depressants?
Most CNS depressants have the potential to be physically and psychologically addictive.
What structure detects the stimulus in the reflex action?
The stimulus is detected by temperature or pain receptors in the skin. These generate impulses in sensory neurons. The impulses enter the CNS ( Central nervous system ) through a part of the spinal nerve called the Dorsal root.
