The Part of the Eye That Expands or Contracts According

question 24

Multiple Choice

The part of the eye that expands or contracts according to the amount of light available is the

• A) choroid.
• B) lens.
• C) iris.
• D) conjunctiva.

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Definitions:

Bronchi

The main passageways directly attached to the lungs that allow air to enter and exit the respiratory system.

Alveoli

Small air pockets in the lungs where oxygen and carbon dioxide are exchanged.

Epithelium

A layer of cells covering the body surfaces, lining cavities, and forming glandular tissue.

Larynx

The hollow muscular organ forming an air passage to the lungs and holding the vocal cords; also known as the voice box.