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Insulin is produced and released from the pineal gland .
Pupils
The opening in the center of the iris of the eye, which regulates the amount of light that enters the eye to reach the retina.
Action Potential
A rapid, temporary change in electrical potential across a cell membrane, leading to the transmission of a nerve impulse along a neuron.
Electric Gradient
A difference in the electrical charge across a membrane, leading to a force that drives the movement of ions.
Neuron Plasma Membrane
The lipid bilayer that encloses the cytoplasm of a neuron, controlling the passage of ions and molecules in and out of the neuron.
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