Which Planets Do NOT Have Any Natural Satellites

question 28

Multiple Choice

Which planets do NOT have any natural satellites?

• A) Mars and Venus
• B) Mercury and Mars
• C) Mercury, Venus, and Mars
• D) Mercury and Venus

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Definitions:

Synaptic Terminals

The ends of axons where neurotransmitters are released to transmit signals across synapses to other neurons or muscle cells.

Neurotransmitter

Chemical substances in the brain that transmit signals from one neuron to another, playing a major role in shaping everyday functions and mood.

Excitatory

Referring to substances or signals that increase the activity of the brain or other body systems, potentially leading to heightened arousal or action.

GABA

GABA (gamma-aminobutyric acid) is the main inhibitory neurotransmitter in the nervous system, playing a critical role in reducing neuronal excitability and regulating muscle tone.