You see a patient who has Guillian-Barre Syndrome, a disorder where the body destroys Schwann cells. What do you hypothesize happens to the patient's knee reflex? It will be decreased because saltatory conduction won't occur It will be exaggerated because the patient will experience increased sensitivity in the dorsal root ganglia. It will be exaggerated because conduction velocity in the multipolar neuron is increased It will be decreased because the spinal cord has decreased white matter. 0000

You see a patient who has Guillian-Barre Syndrome, a disorder where the body destroys Schwann cells. What do you hypothesize happens to the patient's knee reflex? It will be decreased because saltatory conduction won't occur It will be exaggerated because the patient will experience increased sensitivity in the dorsal root ganglia. It will be exaggerated because conduction velocity in the multipolar neuron is increased It will be decreased because the spinal cord has decreased white matter. 0000

Biology (MindTap Course List)

11th Edition

ISBN:9781337392938

Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Publisher:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Chapter41: Neural Signaling

Section: Chapter Questions

Problem 6TYU: A presynaptic neuron in the cerebrum transmits information to hundreds of other neurons. This...

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You are doing a nerve conduction velocity test as shown in the diagram. If the test is performed on a multiple sclerosis patient whose myelinated axons are attacked, how would the conduction velocity differ from that recorded from a normal healthy person? Nerve Monitor Nerve Conduction Velocity Test (NCCV Test) conduction velocity will be faster in the patient. conduction velocity will be slower in the patient. O only the conduction of autonomic nerve is affected. O other:
You are observing in a Physical Therapy clinic and a patient presents with back pain. The images suggest that they have a disc herniation at the disk between L3 and L4. The PT you are working with believes that the disk is putting pressure on the spinal nerve that contains the afferent and efferent neurons that control the patellar tendon reflex. Using the appropriate anatomy and physiology, describe the afferent and efferent portions of this stretch reflex pathway, including a description of the receptor and what it responds to. If you performed a patellar tendon reflex, describe whether you would expect to see an enhanced or diminished response and explain why.
During the patellar reflex, you measure voltage change in the flexor muscle motor neuron cell body in the ventral horn of the spinal cord. After stimulation of the stretch receptors, which of the following would you observe? An EPSP An action potential An IPSP No change in voltage
Label on the diagram: 1. Muscle spindle 2. Sensory neuron 3. Soma of sensory neuron 4. Dorsal root 5. Dorsal root ganglion 6. Dorsal horn 7. Ventral horn 8. Motor neuron to quad 9. Motor neuron to biceps 10. Excitatory synapse 11. Inhibitory synapse What is the name of this reflex? e20SPm idton, How many neurons are Tap your partner's patellar ligament to test their reflexes and try tapping the belly of the brachioradialis muscle to see what happens. involved?
If a mosquito bites you in the forearm, action potentials will have to reach the CNS before you can perceive the bite and react by swatting the mosquito. Which one of the following is the correct sequence of events that takes place from the time the mosquito bites you until you swat it? O somatic sensory receptors, afferent division, primary somatosensory cortex, primary motor cortex, efferent division, SNS, skeletal muscles O visceral sensory receptors, afferent division, primary somatosensory cortex, primary motor cortex, efferent division, SNS, skeletal muscles somatic sensory receptors, efferent division, primary somatosensory cortex, primary motor cortex, afferent division, SNS, skeletal muscles special sensory receptors, afferent division, primary somatosensory cortex, primary motor cortex, efferent division, SNS, skeletal muscles
In the parasympathetic nervous system, what neurotransmitter is released on the target organ? What sort of receptor detects the neurotransmitter? I was thinking the answer would be possibly acetylcholine as the first one and the second one maybe muscarinic? I am not 100% on these answers soo if you could add some information and tell me if that's right.
You and your lab partner have prepared a frog nerve for gathering data on action potentials. You connect an electronic stimulator to the nerve and ask your partner to gradually increase the voltage until you see an action potential. Your partner says that the voltage knob is stuck and will not increase the voltage. To finally get an action potential, they begin to trouble shoot and instead of increasing the voltage, they begin to simulate the nerve over and over again and see an action potential. What type of summation is this describing? action potentials graded potentials spatial summation temporal summation O threshold
Following administration of an opiate drug, "pain signals" are prevented from getting out of the spinal cord via two mechanisms. One inhibits spinal cord neurons that communicate with the parafascicular nucleus of the thalamus. What is the other way that pain signals are stopped? dendro-dendritic synapses that enhance IPSI's in somatosensory neurons. the disinhibition of long axons that start in the spinal cord and influence free nerve endings directly. O a feedback loop to the periaquedictal grey of the midbrain, which enhances neural activity in that area. axo-axonic synapses that prevents somatosensory neurons from releasing neurotransmitter.
Subjecting neurons in the perforant pathway to tetanus stimulation strengthens activity in the dentate gyrus, indicating that long-term potentiation does not occur in the hippocampus. the hippocampus is involved in memory. synapses in the brain do not behave like Hebbian synapses. synapses in the brain can behave like Hebbian synapses.
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Now your professor hands you a new mystery compound, compound B. You add it to the dish with your hippocampal circuit. You fire the presynaptic cell once and get a 0 mV response in the postsynaptic cell. You try to induce LTP by firing the presynaptic cell rapidly (high frequency stimulation or HFS). After the HFS, you fire the presynaptic cell once and you still get a 0 mV EPSP. What is the most likely mechanism of action of the compound B? Group of answer choices AMPA receptor antagonist NDMA receptor antagonist NMDA receptor agonist AMPA receptor agonist