The membrane that surrounds a cell acts as a gateway. this the cell stay healthy. why does the cell need a gateway? a. cells need a way to take in and remove blood. b. cells need a way to take in food and waste. c. cells need a way to take food in and remove waste. d. cells need a way to move food in, but they do not have any waste.

A cell needs a gateway because the cell needs to taken in food and remove waste.

Explanation:

Cell membrane acts as a gateway to the cell. A clear separation has to be maintained between the interior and exterior of the cell. It is the function of cell membrane to maintain this separation.

Cell membranes are mainly composed of lipids, proteins and carbohydrates.  The movement of substances to the inside and outside of the cell is facilitated by the cell membrane.

Depending on whether energy is expended or not transport across cell membrane can be passive or active.  

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explanation: a formula which shows the arrangement of atoms in the molecule of a compound

a plasma is a warm ionized gasoline consisting of approximately equal numbers of definitely charged ions and negatively charged electrons. the characteristics of plasmas are notably unique from the ones of ordinary neutral gases in order that plasmas are considered a awesome "fourth kingdom of remember."