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A and P Transport

QuestionAnswer
What is diffusion? The net movement of molecules from a region of high concentration to one of low concentration.
The net movement of water molecules across a membrane is called . . . Osmosis
Facilitated diffusion allows the movement of ______ molecules across the plasma membrane. Carbohydrate
True or False - Cells shrink in hypertonic solutions. True
Cells swell in _____ solutions. Hypotonic
When concentrations inside and outside the cell are equal, the inside and outside environments are said to be _____. Isotonic
What is the movement of molecules across a membrane with the help of certain transport proteins? Facilitated diffusion
The cell membrane encloses the cell, forming a barrier that separates the ___ and ___ environments. Interior/Exterior
Why does the process of active transport require energy? The molecules being moved are traveling from a low concentration to a high concentration
True or False - Active transport does not require special proteins called transport proteins. False
What does an ATP molecule supply? Energy
True or False - Endocytosis is a form of active transport True
Certain molecules like polypeptides, polysaccharides, and DNA are too large or small to be transported into the cell by carrier proteins. Large
_____ and ____ are both types of endocytosis Phagocytosis and Pinocytosis
A membrane that is ____ permeable allows certain substances to pass but nt others. Selectively
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