Which of the Following Tissues Represent the Four Distinct Densities

question 6

Multiple Choice

Which of the following tissues represent the four distinct densities recognized in the x-ray (from higher to lower density) ?

• A) Bone, water, air, fat
• B) Fat, bone, water, air
• C) Bone, water, fat, air
• D) Air, fat, water, bone

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Definitions:

Refractory Period

A time directly following stimulation in which a nerve or muscle is incapable of responding to more stimulation.

Synapse

The junction or region between the axon of one neuron and the dendrites or cell body of another, through which nerve impulses pass.

Depolarization

A decrease in the difference of electrical charge across a membrane, which can initiate an action potential in neurons.

Neural Membrane

The lipid bi-layer that encloses the cytoplasm of neurons, playing a key role in the transmission of electrical signals within the nervous system.