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Flashcards in Review 1 Deck (16):
1

The movement of particles from an area of high concentration to an area of low concentration is known as?

Diffusion

2

When you try and understand a system as a whole, such as the nervous system, this is known as ______ approach

complex system

3

What two forces influence the movement of ions?

1. concentration gradient
2. difference in potentials

4

Action potentials are critical for the transmission of information through the nervous system for what primary reason?

communication

5

In order to depolarize the membrane and generate an action potential, which ion must enter the cell? In order to hyperpolarize the membrane and return to the resting potential, which ion must exit the cell?

Depolarization: Na rapidly enters the cell.
Hyperpolarization: K rapidly exits the cell

6

The absolute and relative refractory periods are caused by what? Why are those refractory periods important?

They are caused by the generation of an action potential. Relative refractory period is possible to generate another AP. Absolute refractory period is not possible to generate another AP.

7

How is the conductance of Na and K different. Why is this important?

Action potential and to keep them from backfiring.

8

When a membrane depolarizes, it becomes more _____. When a membrane hyperpolarizes, it becomes more _____.

positive; negative

9

What is the all or none law?

Either the membrane does not generate an action potential or it generates an action potential with a standard magnitude

10

Orthodomic Transmission

from soma to terminal branches

11

Anti-orthodomic

end of axon to soma

12

Obligatory

action potential on the presynaptic membrane always gives rise to an action potential on postsynaptic membrane

13

Nonobligatory

a single action potential on the presynaptic membrane is typically unable to induce an action potential on postsynaptic membrane

14

What is the response of a muscle to a single stimulus called?

Twitch

15

the neurons that conduct action potentials at the slowest velocity are

small diameter, unmyleinated

16

The movement of particles from an area of high pressure to an area of low pressure is known as?

Convection