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Describe two important reasons why the ability to put telescopes in space dramatically affected the science of astronomy.
Neurotransmitter
Substances that act as intermediaries, sending signals from one nerve cell to another neuron, muscle cell, or gland cell across a chemical synapse.
Dopamine
A neurotransmitter involved in reward, motivation, and pleasure systems in the brain, influencing both movement and emotional responses.
Serotonin
A neurotransmitter in the brain that contributes to feelings of well-being and happiness.
All Or None Law
A principle stating that the strength of a response of a nerve cell or muscle fiber is not dependent on the strength of the stimulus.
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