Examlex
Which of the following is a valid null hypothesis to test a correlation?
Cell Membrane
A biological membrane that separates the interior of all cells from the outside environment, controlling the passage of substances in and out of the cell.
Myelin
A fatty substance that forms a sheath around the axons of many neurons, facilitating fast and efficient electrical conduction of nerve impulses.
Resting State
A condition or period in which something is not active or operating, often used in reference to the brain or body.
Axon
A long, slender projection of a nerve cell, or neuron, that typically conducts electrical impulses away from the neuron's cell body.
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