Find the Center and the Radius of the Circle

question 66

Multiple Choice

Find the center and the radius of the circle.
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• A)(3, 0), r = 81
• B)(0, 3), r = 9
• C)(-3, 0), r = 9
• D)(0, -3), r = 81

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Definitions:

Agonist

A chemical substance that binds to and activates receptor cells to produce a biological response.

Synaptic Gap

The synaptic gap is the tiny space between neurons through which neurotransmitters travel to communicate signals.

Neurotransmitter Molecules

Chemical substances that transmit signals across the synaptic gap from one neuron to another.

Reuptake

The process by which neurotransmitters are taken back into the synaptic vesicles from the synaptic cleft, effectively stopping their action on nearby neurons.