Exhibit 19-5 ​

question 48

Multiple Choice

Exhibit 19-5
​

-Refer to Exhibit 19-5. For graph (3) , if the seller of X raises the price from $1.50 to $2.00, the total revenue the seller receives will

• A)decrease by $30.
• B)increase by $30.
• C)decrease by $5.
• D)not change.

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Definitions:

Antigens

Foreign substances in the body that trigger an immune response.

Cytokines

Small proteins that are crucial in controlling the growth and activity of other immune system cells and blood cells.

Fibroblasts

A type of cell found in connective tissue which produces collagen and other fibers.