| Term | Definition |
|---|
| lipid bilayers | cell membranes are constructed mainly of |
| osmosis | The movement of water molecules across a selectively permeable membrane is known as |
| away from the area where it is more concentrated | A substance that moves across a cell membrane without using the cell's energy tends to move |
| channels and pumps | The embedded proteins inside a cell membrane form___ that enable materials to move across the cell membrane. |
| mass, volume | The concentration of a solution is the __ of solute in a given __ of solution |
| diffusion | In __, particles tend to move from an area where they are more concentrated to an areas where they are less concentrated |
| equilibrium | When diffusion is complete, the system has reached ____. |
| The net movement of water would move into the cell. | This describes the expected result when a typical cell is placed into fresh water. |
| exocytosis | Which process always involves the movement of materials from inside the cell to outside the cell. |
| bulk transport, molecular transport | List two types of active tranport. |
| Na-K ion pump, H ion pump | List two types of molecular tranport |
| endocytosis, exocytosis | List two examples of bulk transport |
| phagocytosis, pinocytosis | List two types of endocytosis |
| osmosis, diffusion, facilitated diffusion | List three examples of passive transport |
| cell will wilt | What will happen to a plant cell when placed in a hypertonic solution? |
| cell will burst | What will happen to a red blood cell when placed in a hypotonic solution? |
| cell membrane | In the starch lab, what did the plastic sandwich big represent? |
| starch turn blue-black | In the starch lab, what was the evidence that the iodine-water entered the sandwich bag? |
| thin | Biological membranes are __, flexible surfaces separating cells and cell compartments from their environments. |
| hydrophillic | Each phospholipid has a _____ head. |
| hydrophobic | Each phospholipid has _____ tails. |
| phosphate | The phospholipid head is composed of ____. |
| lipid | The phospholipid tails are composed of ___. |
| active transport | Which means of particle transport requires input of energy from the cell? |
| passive transport | Which means of particle transport does not require the input of energy from the cell? |
| identify the cell | The embedded proteins with carbohydrate chains with a cell membrane serve to ____ |
| move out | A gummy bear is place in salt water, describe the movement of water. |
| proteins embedded within two layers of phospholipids | Which describes the structure of a plasma membrane? |
| sodium-potassium ion pump | The movement of sodium ions from an area of higher concentration to an area of lower concentration is called _____. |
| swell. | A cell placed in distilled water will |
| the expulsion of materials from cellular vesicles. | Exocytosis involves |
| less than that inisde of a cell | A hypotonic solution is one whose concentration is: |
| taking in solids by the cell | What is phagocytosis? |
| cholesterol | This lipid strengthens the membrane and make it less sensitive to lysis. |
| regulates which materials enter and leave the cell | What is a function of the cell membrane? |
| an example of homeostasis | A white blood cell through phagocytosis destroying a bacterium |
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