Which of the Following Is Responsible for the Dramatic Increase

question 1

Multiple Choice

Which of the following is responsible for the dramatic increase in life expectancy during the twentieth century?

• A)Technology increases in the field of medical laboratory research
• B)Advances in surgical techniques and procedures
• C)Sanitation and other public health activities
• D)Use of antibiotics to fight infections

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Definitions:

Alveoli

Tiny air sacs in the lungs where the exchange of oxygen and carbon dioxide occurs.

Diaphragm

A dome-shaped, muscular partition separating the thorax from the abdomen in mammals, playing a major role in breathing by contracting and expanding the lungs.

Bronchi

The large air passages that lead from the trachea (windpipe) into the lungs and become smaller tubes within the lungs called bronchioles.

Trachea

A large membranous tube reinforced by rings of cartilage, extending from the larynx to the bronchial tubes, conveying air to and from the lungs.