Question

Passive symports and antiports paragraph​

Answer 1

Answer:

Some carrier or transport proteins allow diffusion only if two types of molecules move together. In a symport, both molecules cross the membrane in the same direction; in an antiport, they move in opposite directions.

When a molecule moves across a membrane independent of other molecules, the process is called uniport.

Answer 2

Answer:

Passive transport is a type of membrane transport that does not require energy to move substances across cell membranes.Instead of using cellular energy, like active transport, passive transport relies on the second law of thermodynamics to drive the movement of substances across cell membranes.Fundamentally, substances follow Fick's first law, and move from an area of high concentration to one of low concentration because this movement increases the entropy of the overall system.The rate of passive transport depends on the permeability of the cell membrane, which, in turn, depends on the organization and characteristics of the membrane lipids and proteins.The four main kinds of passive transport are simple diffusion, facilitated diffusion, filtration, and/or osmosis.

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