Neurophysiology of never impulses

Axons are2.

neurophysiology of nerve impulses pre lab quiz

Which of the following is easier? You correctly answered Would the response at R2 after lidocaine application necessarily bezero?

what does ttx do to voltage-gated na+ channels

Which of the following modalities will induce the largest amplitudereceptor potential in the olfactory receptor? Starting at a resting membrane potential of mV, a change to which of the followingrepresents the largest receptor potential?

How well did the results compare with your prediction?

axons are

Why did the free nerve ending respond to several different modalities? Exocytosis of neurotransmitter from the axon terminal is triggered by an increase in theintracellular concentration of4.

Why is the resting membrane potential the same value in both the sensory neuron and the interneuron?

The PNS is a complex network of nerves branching across the whole body, 12 pairs of cranial nerves originate from the brain and 31 pairs of spinal nerves originate from the spinal cord. Exocytosis of neurotransmitter from the axon terminal is triggered by an increase in theintracellular concentration of4. Define the absolute refractory period. At the target, neurotransmitter. Eatingpuffer fish can cause numbness of the lips, probably because1. Why did the free nerve ending respond to several different modalities? It is harder to generate a second action potential soon after the first action potentialbecause1. Assuming that the resting potential of a sensory neuron is mV, which of thefollowing represents a depolarization? Neurotransmitter released into the synaptic gap reaches the target cell by5. In the control, the amplitudes of the action potentials at R1 and R2 are the same. Which of the following modalities will induce the largest amplitudereceptor potential in the Pacinian corpusclePredict Question 2: The adequate stimuli for olfactory receptors are chemicals, typicallyodorant molecules. With a prolonged stimulus that is just above more depolarized than threshold, youwould expect to get additional action potentials when the membrane has completed3. Neurons have a large number of extensions called dendrites. One extension is different from all the others, and is called Physioex 9. Physio Ex 8.

It is primarily the surfaces of the dendrites that receive chemical messages from other neurons. Which of the following is a sensory stimulus?

Define the term threshold as it applies to an action potential

Which of the following can reduce the likelihood of an action potential? Whichof the following explains this? Olfactory receptor neurons respond to low concentrations of chemical odorantsbecause there are membrane proteins in the receptor ending of this sensory neuron that3. How well did the results compare with your prediction? Increasing the extracellular potassium reduces the concentration gradient, and less potassium diffuses out of the neuron and into the cell. If anerve, rather than an axon, had been used in the lidocaine experiment, the responsesrecorded at R1 and R2 would be the sum of all the action potentials called a compoundaction potential. How does the effect oflidocaine differ from the effect of TTX? You correctly answered With a prolonged stimulus that is just above more depolarized than threshold, youwould expect to get additional action potentials when the membrane has completed3. Which of the following is a sensory stimulus? Eatingpuffer fish can cause numbness of the lips, probably because1.
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Exp 3: Neurophysiology of Nerve Impulses Flashcards by Mandy Bauer