The Shape of Single Crystals or Aggregates of Many Well-Formed

question 25

Multiple Choice

The shape of single crystals or aggregates of many well-formed crystals is known as:

• A) streak
• B) habit
• C) luster
• D) cleavage

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Definitions:

Bronchogram

A radiographic image of the bronchi, usually obtained after the airways have been filled with a contrast medium, for diagnostic purposes.

Air Passageways

The routes throughout the respiratory system, including the nose, throat, windpipe, and lungs, through which air is inhaled and exhaled.

Radioactive Chemical

A substance that contains unstable atoms which release radiation as they decay.

PET Scan

Positron Emission Tomography, a sophisticated imaging technique that uses radioactive substances to visualize and measure changes in metabolic processes and in other physiological activities including blood flow, regional chemical composition, and absorption.