Virtual Lab Simulation Activity
Virtual Lab Stimulation Exercise 3 Activities 1-5
Study online at quizlet.com/_cfevi
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
An action potential is an "all-ornothing" event. Explain what is meant by this phrase.
This means that once the threshold is met, an action potential occurs. If the stimulus is too small an action potential does not occur.
An action potential is usually initiated in an axon at or near what? The axon hillock, the initial segment, and the trigger zone.
The adequate stimuli for olfactory receptors are chemicals, typically odorant molecules. Which of the following modalities will induce the largest amplitude receptor potential in the olfactory receptor?
Moderate-Intensity
Chemical.
The adequate stimulus for a
Pacinian corpuscle is …show more content…
Which way would Na+ move across the membrane if there were open
Na+ channels?
Na+ would diffuse into the cell.
75.
Why did the free nerve ending respond to several different modalities?
The sensory end of this nerve is less specialized.
76.
Why didn't the Pacinian corpuscle respond to high-intensity light?
Light-transducing proteins are not present in the
Pacinian corpuscle.
77.
Why do you think TTX is not used during dental procedures?
TTX irreversibly blocks voltage-gated sodium channels in axonal membranes.
Why is it harder to generate a second action potential during the relative refractory period?
A greater stimulus is required because voltage-gated
K+ channels that oppose depolarization are open during this time.
Why is the action potential recorded by the second recording electrode
(R2) delayed relative to the action potential recorded by the first recording electrode (R1)?
The action potential had to propagate from R1 to R2.
With a slower timescale, the appearance of the action potentials generated at R1 and R2 will appear to do what?
To be compressed in time but have the same peak value of response.
73.
74.
78.
79.
Study online at quizlet.com/_cfevi
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
An action potential is an "all-ornothing" event. Explain what is meant by this phrase.
This means that once the threshold is met, an action potential occurs. If the stimulus is too small an action potential does not occur.
An action potential is usually initiated in an axon at or near what? The axon hillock, the initial segment, and the trigger zone.
The adequate stimuli for olfactory receptors are chemicals, typically odorant molecules. Which of the following modalities will induce the largest amplitude receptor potential in the olfactory receptor?
Moderate-Intensity
Chemical.
The adequate stimulus for a
Pacinian corpuscle is …show more content…
Which way would Na+ move across the membrane if there were open
Na+ channels?
Na+ would diffuse into the cell.
75.
Why did the free nerve ending respond to several different modalities?
The sensory end of this nerve is less specialized.
76.
Why didn't the Pacinian corpuscle respond to high-intensity light?
Light-transducing proteins are not present in the
Pacinian corpuscle.
77.
Why do you think TTX is not used during dental procedures?
TTX irreversibly blocks voltage-gated sodium channels in axonal membranes.
Why is it harder to generate a second action potential during the relative refractory period?
A greater stimulus is required because voltage-gated
K+ channels that oppose depolarization are open during this time.
Why is the action potential recorded by the second recording electrode
(R2) delayed relative to the action potential recorded by the first recording electrode (R1)?
The action potential had to propagate from R1 to R2.
With a slower timescale, the appearance of the action potentials generated at R1 and R2 will appear to do what?
To be compressed in time but have the same peak value of response.
73.
74.
78.
79.