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7Sci Chapter 14-1
Cell In Action Section 1
Question | Answer |
---|---|
What is the movement of water through a membrane called? | osmosis |
What are particles moving across a cell membrane without using energy called? | passive transport |
What are the passageways in a cell membrane? | channels |
What is the movement of particles from an area of low to an area of high concentration across a cell membrane? | active transport |
What are two examples of passive transport? | diffusion and osmosis |
What does a cell need to transport particles by active transport? | energy |
What are the channels in a cell membrane made with? | proteins |
What process is important to cell functions? | osmosis |
What is the fluids mostly made of that surround and fill a cell? | water |
What is the process by which a cell membrane surrounds and encloses a large particle to bring it into a cell? | endocytosis |
What are the particles called that make up water? | molecules |
What is the result of osmosis? | water particles move to where they are less concentrated |
What is the process by which a cell membrane gets rid of large particles? | exocytosis |
What part of the cell do materials pass through to get into and out of the cell? | cell membrane |
What is a vesicle? | It is a sac formed from a piece of cell membrane, often used to move large particles into or out of a cell. |
When does a cell not need to use energy? | diffusion |
When wilted celery is soaked in water, it becomes crisp again due to what? | osmosis |
What do all organisms need in order to live? | energy and raw materials |
What do all organisms need to get rid of in order to live? | wastes |
What helps wilted plants become firm during osmosis? | water |
What does it require to move materials through a cell membrane by active transport? | energy |