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Cell Transportation
| Definition | Term |
|---|---|
| Cell membrane that permits only certain molecules or ions to pass through it is said to be ___________________ __________________ | selectively permeable |
| A thin, semi-permeable barrier that surrounds and protects all living cells is called the ________ _______________ | cell membrane |
| The three major molecules which make up the cell membrane. | lipids, carbohydrates, proteins |
| The movement of molecules across a cell membrane from an area of high concentration to an area of low concentration, a process that does not require the cell to expend energy | passive transport |
| The three types of passive transport are............. | diffusion, facilitated diffusion, osmosis |
| A type of passive transport where substances move from an area of high concentration to an area of low concentration without the cell using energy | diffusion |
| A type of passive transport when water moves from high to low concentration | osmosis |
| A type of passive transport when a large or charged molecule move through a protein channel in the cell membrane | facilitated diffusion |
| An__________ solution where the concentration of solutes is equal both inside and outside the cell resulting in no net movement of water across the cell membrane. | isotonic |
| A solution that has a lower solute concentration, and therefore a higher water concentration, compared to a cell or another solution | hypotonic |
| A solution with a higher concentration of solutes and thus a lower concentration of water compared to another solution | hypertonic |
| A hypotonic solution will cause a cell to _____________ and ________. | hypotonic |
| A hypertonic solution will cause a cell to ___________ and _______. | hypertonic |
| A cellular process that moves molecules across a cell membrane against their concentration gradient, requiring energy | active transport |
| _______________is the active cellular process of taking substances into a cell by engulfing them with the cell membrane | Endocytosis |
| ____________is the cellular process of expelling materials out of the cell via vesicles. | Exocytosis |
| ____________protein in cell membranes that pumps sodium ions out of the cell and potassium ions into it, maintaining concentration gradients essential for cell function, nerve impulses, and cell volume regulation | sodium-potassium pump |
| _______________are biological stimuli that amplify a response to a stimulus, causing a greater change in the same direction, and are often involved in achieving a necessary, decisive outcome rather than maintaining homeostasis | ositive feedback systems |
| ________________biological mechanism that maintains a stable internal environment by counteracting or reversing a change or stimulus | negative feedback system |
Created by:
Wesley Rogers
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