Which of the Following Is NOT Commonly Used as a Contrast

question 5

Multiple Choice

Which of the following is NOT commonly used as a contrast medium?

• A)Barium
• B)Air  
• C)Water
• D)Iodine

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Definitions:

Neural Transmission

The process by which neurons communicate with each other through electrical and chemical signals.

Action Potentials

Electrical impulses that are the means of communication and signal transmission within the nervous system, particularly among neurons.

Excitatory Postsynaptic

Pertaining to the process in which a neurotransmitter increases the likelihood of an action potential firing in the postsynaptic neuron.

Electric Potential

The amount of electric potential energy per unit charge at a point in a field, representing the force that would be exerted on a positive test charge placed at that point.