Which of the Following Statements Concerning Tumors in the Upper

question 8

Multiple Choice

Which of the following statements concerning tumors in the upper airway is true?

• A) There may be variable or fixed obstruction.
• B) Fixed obstruction will be present.
• C) Variable obstruction will be present.
• D) Small airway obstruction will result.

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Definitions:

Asymmetric Centers

An asymmetric center in a molecule is a carbon or other atom bonded to four different groups, creating chirality and enabling optical activity.

Specific Rotation

A measure of the amount a substance rotates the plane of polarized light, specific to its molecular structure and concentration.

Dextrorotatory

Describes a substance that rotates the plane of polarized light to the right, or clockwise, as seen by an observer towards the light source.

Levorotatory

Describing a substance that rotates the plane of polarized light to the left or counterclockwise.