An Endogenous Variable

question 6

Multiple Choice

An endogenous variable

• A)is a variable whose value is determined outside the model.
• B)is a variable whose value is determined within the model.
• C)is a variable from another country.
• D)cannot be proven wrong.

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Definitions:

Perforin

A protein secreted by natural killer cells and cytotoxic T lymphocytes to kill cells by forming pores in their membranes.

Alpha Interferon

A type of protein produced by the body's immune system, used in the treatment of various infections and diseases, including some types of cancer.

Lymphotoxin

A cytokine produced by certain lymphocytes that can induce cell death and has a role in immune response.

Cytokines

Small proteins released by cells, particularly immune cells, that have a specific effect on the interactions and communications between cells.