What Element Is Used to Define the Atomic Mass Unit

question 13

Multiple Choice

What element is used to define the atomic mass unit scale?

• A) hydrogen
• B) oxygen
• C) neon
• D) carbon

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Definitions:

Goblet Cells

Specialized, mucus-producing cells found in the respiratory and intestinal tracts, which help to protect and lubricate the surfaces.

Pseudostratified Epithelium

A type of tissue lining some internal organs and passages, appearing as multiple layers but actually consists of a single layer of irregularly shaped cells.

Simple Columnar Epithelium

A single layer of tall, closely packed cells, aligned in a row, found in areas such as the digestive tract, where they play roles in absorption, secretion, and protection.

Stratified Columnar Epithelium

A type of epithelial tissue composed of several layers of column-shaped cells, designed to protect or secrete substances.