Term
| What is the cell membrane composed of? |
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Definition
| Lipid bilayer and proteins and carbohydrates |
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Term
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Definition
| Movement of molecules wihtout any input of energy of the cell |
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Term
| Two types of passive transport |
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Definition
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Term
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Definition
| Movement of molecules from an area of higher concentraiton to an area of lower concentration until they reach equilibrium |
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Term
| What is the process of random motion |
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Definition
| move randomly - travel in a straight line - hit an object - rebound off object - move off in another direction |
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Term
| How much energy is required for passive transport? |
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Definition
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Term
| What is concentration gradient |
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Definition
| The difference in concentration of molecules across a space |
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Term
| How are molecules moving at the equilibrium |
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Definition
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Term
| What does diffusion dependent on? |
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Definition
| size and chemical nature of molecules |
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Term
| What molecules are polar and nonpolar? |
|
Definition
Polar - H2O
Nonpolar - CO2 & O2 |
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Term
| Where do small molecules enter the cell membrane? |
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Definition
|
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Term
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Definition
| water molecules diffusing across a membrane from an area of higher concentration to an area of lower concentration |
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Term
| What are the three times of osmotic solutions? |
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Definition
Hypertonic
Hypotonic
Isotonic |
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Term
| Define a hypotonic solution |
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Definition
| concentration of solute molecules outside of cell is lower |
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Term
| In a hypotonic solution, what may happen to the cell? |
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Definition
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Term
| What prevents lysis in plant cells from bursting? |
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Definition
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Term
| What do protists use to pump out excess water and prevent their cell from exploding? |
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Definition
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|
Term
| What is the funciton of the contractile vacuole? |
|
Definition
| pump out excess water and prevent their cell from exploding |
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Term
| What is a hypertonic solution? |
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Definition
| Concetration of solute molecules outside of the cell is higher |
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Term
| Where does water move in a hypertonic solution? |
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Definition
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Term
| When water moves out of the cell, what does it cause? |
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Definition
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|
Term
| What causes plants to wilt? |
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Definition
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Term
| Water always flows from ______ solution to _______ solutions |
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Definition
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Term
| Define an Isotonic solution |
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Definition
| When concentration of solutes inside and out of cells are equal |
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Term
| Water moves at what kind of rate during an isotonic solution? |
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Definition
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Term
| What are found in equal amounts during isotonic solutions? |
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Definition
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