Protoplanets

question 95

Multiple Choice

Protoplanets

• A)grew in size primarily by accretion.
• B)grew in size primarily by condensation.
• C)are still visible today as the terrestrial planets.
• D)grew in size by collecting the particles in the solar wind.
• E)grew in size by the collision and coalescing of planetesimals.

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Definitions:

Neurons

Neurons are the basic working units of the brain, specialized cells responsible for receiving, processing, and transmitting information through electrical and chemical signals.

Semipermeable

Characteristic of a membrane that allows certain substances to pass through it while blocking others.

Depolarization

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

Sodium Ions

Positively charged atoms (Na+) that play crucial roles in physiological processes, including nerve impulse transmission and muscle contraction.