Determine Whether the Product Will Be Positive, Negative, Zero, or Whether

question 55

Multiple Choice

Determine whether the product will be positive, negative, zero, or whether there is not enough information to say.
-The product of zero and two negative numbers.

• A) zero
• B) positive
• C) negative
• D) not enough information

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Definitions:

Memory Cells

B or T cells (lymphocytes) that permit rapid mobilization of the immune response on second or subsequent exposure to a particular antigen. See memory B cells and memory T cells.

Dendritic Cells

Immune cells that process antigen material and present it on their surface to other cells of the immune system, playing a critical role in triggering adaptive immunity.

Natural Killer Cells

A type of lymphocyte (white blood cell) that plays a major role in the rejection of tumors and cells infected by viruses.

Interferons

A group of signaling proteins made and released by host cells in response to the presence of pathogens, such as viruses, bacteria, or tumor cells.