The Appearance of the Great Range of Brightness Among Stars

question 34

Multiple Choice

The appearance of the great range of brightness among stars is due to

• A)the differences in the amount of light different stars emit.
• B)the differences in the distances of stars from us.
• C)both of the given answers
• D)none of the given answers

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Definitions:

Action Potential

A rapid rise and subsequent fall in voltage or electrical charge across a cellular membrane, the basis for neural communication and muscle contraction.

Afterpotential

Afterpotential is the transient electrical polarization that follows the action potential in nerve cells or muscle fibers, impacting the cell's excitability.

Depolarization

A decrease in the difference in electrical charge across a cell's plasma membrane, making the inside of the cell less negative compared to the outside.

Hyperpolarization

Hyperpolarization is an increase in a cell's membrane potential, making it more negative and less likely to fire an action potential.