Examlex
Which of the following is a method of rationing scarce goods and services?
Blood-Brain Barrier
A semi-permeable barrier of endothelial cells that prevents most substances in the blood from entering the brain, thereby maintaining the brain's chemical environment.
Toxic Substances
Materials or compounds that can cause harm to living organisms through ingestion, inhalation, or skin absorption.
Neurons
Specialized cells of the nervous system that transmit information through electrical and chemical signals.
Sensory Neuron
Neurons responsible for converting external stimuli from the environment into internal electrical impulses towards the CNS.
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