Physiology Flashcards

Physiology Flashcards

Assessment

Flashcard

Science

University

Hard

Created by

Javier Buenrostro

Used 1+ times

FREE Resource

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27 questions

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1.

FLASHCARD QUESTION

Front

What is an action potential?

Back

A rapid, all-or-nothing electrical signal that travels along the neuron's axon.

2.

FLASHCARD QUESTION

Front

What triggers an action potential?

Back

It is triggered when the membrane potential reaches a certain threshold.

3.

FLASHCARD QUESTION

Front

What happens during depolarization in an action potential?

Back

Sodium (Na⁺) channels open, and Na⁺ rushes in, making the inside of the cell more positive.

4.

FLASHCARD QUESTION

Front

What happens during repolarization in an action potential?

Back

Potassium (K⁺) channels open, and K⁺ exits, making the inside of the cell negative again.

5.

FLASHCARD QUESTION

Front

What happens during hyperpolarization in an action potential?

Back

The membrane potential drops below the resting potential briefly before stabilizing.

6.

FLASHCARD QUESTION

Front

What is a graded potential?

Back

A small, localized change in membrane potential that varies in size and can be excitatory or inhibitory.

7.

FLASHCARD QUESTION

Front

Where do graded potentials occur in a neuron?

Back

Graded potentials occur in the dendrites and cell body.

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