Which of the Following Might Explain Why Most People Are

question 66

Multiple Choice

Which of the following might explain why most people are sick more often as children than as adults in their 20s through 50s?

• A) The immune system does not appear until the preteen years.
• B) The thymus is so active in children that it fights bacteria so hard that it produces strong symptoms of disease.
• C) Because of their small size, children's bodies cannot contain as much lymphoid tissue as those of adults.
• D) We build up many varieties of memory lymphocytes during childhood, providing immunity to more and more antigens during adulthood.

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Definitions:

Mucus

A thick, slippery substance produced by mucous membranes and glands for protection and lubrication in various body parts, such as the nose, throat, and lungs.

Pulmonary Fibrosis

A lung disease that occurs when lung tissue becomes damaged and scarred, making it difficult for lungs to work properly.

Pleurisy

An inflammation of the pleura, the two layers of membranes surrounding the lungs and lining the chest cavity.

Alveoli

Tiny air sacs in the lungs where the exchange of oxygen and carbon dioxide takes place, crucial for breathing.