Physiology Chapter 2-Graded potentials Flashcards
1
Q
What is an active area?
A
The temporarily depolarized area.
2
Q
What is a current?
A
Any flow of electrical charge. The direction of current flow is that in which the positive charges are moving.
3
Q
How do graded potentials diminish?
A
In decremental fashion. Current is lost across the plasma membrane as charge-carrying ions leak through open channels
4
Q
Can graded potentials trigger action potentials?
A
yes
5
Q
What are graded potentials?
A
Local changes in the membrane potential that occur in varying grades or degrees of magnitudes or strength.
6
Q
If a stimulus is longer, what happens to the graded potential?
A
The duration is also longer.
7
Q
If the stimulus is stronger, what happens to the graded potential?
A
The larger the depolarizing graded potential is at the point of origin.
