The Most Common Element by Mass Percent in the Human

question 1

Multiple Choice

The most common element by mass percent in the human body is

• A)carbon.
• B)hydrogen.
• C)oxygen
• D)sulfur.
• E)phosphorus.

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Definitions:

Axon

A long, slender projection of a nerve cell, or neuron, that typically conducts electrical impulses away from the neuron's cell body.

Dendrites

The branched projections of a neuron that act to conduct the electrochemical stimulation received from other neural cells to the body, or soma, of the neuron.

Myelin Sheath

A fatty layer that encases the axons of many neurons, speeding up the transmission of nerve impulses.

Multiple Sclerosis

A chronic autoimmune disease that affects the central nervous system, leading to various neurological symptoms.