1. What is a graded potential?
a. Electrical impulse generated along the membrane of dendrites and cell bodies
b. Short distances
c. Small deviation from rmp
2. What kind of channels cause graded potentials?
a. Mechanically gated and chemically gated channels
3. What's depolarizing?
a. Membrane potential less polarized more positive
4. What is hyperpolarizing?
a. Making membrane potential more polarized, too polarized, more negative
5. What determines graded potential strength?
a. Greater the strength of the stimulus the greater the amplitude of the graded
potential?
6. When two or more graded potentials happen together you can?
a. Add them together for a greater amplitude
7. What is decremental conduction?
a. The amplitude of graded potential decreases with greater distance from initial site
of depolarization
8. What is an action potential?
a. Rapid reversal of membrane potential due to changes in membrane permeability
b. Very fast
c. Non decremental
d. All or none
e. Amplitude always the same no matter the size of the stimulus
9. What is the threshold?
a. Critical level that must be reached for ap to occur and the voltage gated channels
to open
10. What is depolarization?
a. Increase in membrane potential due movement of sodium to inside cell
11. What is repolarization?
a. Decrease in membrane potential sodium channels close and potassium moves
out of cell
12. Where are the voltage gated channels?
a. Nodes of ranvier
13. What are the three modes of the voltage gated sodium channels?
a. Closed but can open
b. Open activated
c. Closed inactivated cannot open
14. When is the refractory period?
a. No new ap
b. When the sodium voltage gated channels are open and inactivated.
15. Which voltage gates open and close faster after threshold?
a. Sodium
16. How do you know the strength of the stimulus from the AP?
a. Electrical impulse generated along the membrane of dendrites and cell bodies
b. Short distances
c. Small deviation from rmp
2. What kind of channels cause graded potentials?
a. Mechanically gated and chemically gated channels
3. What's depolarizing?
a. Membrane potential less polarized more positive
4. What is hyperpolarizing?
a. Making membrane potential more polarized, too polarized, more negative
5. What determines graded potential strength?
a. Greater the strength of the stimulus the greater the amplitude of the graded
potential?
6. When two or more graded potentials happen together you can?
a. Add them together for a greater amplitude
7. What is decremental conduction?
a. The amplitude of graded potential decreases with greater distance from initial site
of depolarization
8. What is an action potential?
a. Rapid reversal of membrane potential due to changes in membrane permeability
b. Very fast
c. Non decremental
d. All or none
e. Amplitude always the same no matter the size of the stimulus
9. What is the threshold?
a. Critical level that must be reached for ap to occur and the voltage gated channels
to open
10. What is depolarization?
a. Increase in membrane potential due movement of sodium to inside cell
11. What is repolarization?
a. Decrease in membrane potential sodium channels close and potassium moves
out of cell
12. Where are the voltage gated channels?
a. Nodes of ranvier
13. What are the three modes of the voltage gated sodium channels?
a. Closed but can open
b. Open activated
c. Closed inactivated cannot open
14. When is the refractory period?
a. No new ap
b. When the sodium voltage gated channels are open and inactivated.
15. Which voltage gates open and close faster after threshold?
a. Sodium
16. How do you know the strength of the stimulus from the AP?
