A Certain Cell Type Has Existed in the Blood and Tissue

question 27

Multiple Choice

A certain cell type has existed in the blood and tissue of its vertebrate host's immune system for over 20 years. One day, it recognizes a newly arrived antigen and binds to it, subsequently initiating a secondary immune response in the body. Which of the following cell types most accurately describes this cell?

• A) plasma cell
• B) thyroid cell
• C) memory cell
• D) macrophage

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Definitions:

Production Possibility Frontier

The Production Possibility Frontier (PPF) is a graphical representation that shows the maximum quantity of two goods or services that a society can produce, given fixed resources and technology, highlighting the trade-offs in production choices.

Labor Force

The total number of people, including both the employed and the unemployed, who are of working age and seeking employment.

Opportunity Cost

The value of the next best alternative that is foregone when making a choice.

Productive Resources

Factors used in the production of goods and services, which include labor, capital, and natural resources.