A Marker on the Surface of a Foreign Substance That

question 108

Short Answer

A marker on the surface of a foreign substance that identifies it to immune cells as "nonself" is called a(n) ________.

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Definitions:

First Week

The initial seven-day period of time, often used in reference to specific processes, events, or stages in development.

Gas Exchange

The process of obtaining oxygen from the environment and releasing carbon dioxide, crucial for respiration in living organisms.

Chorion

Extraembryonic membrane functioning for respiratory exchange in birds and reptiles; contributes to placenta formation in mammals.

Allantois

Extraembryonic membrane that accumulates nitrogenous wastes in the eggs of reptiles, including birds; contributes to the formation of umbilical blood vessels in mammals.