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Diffusion & Osmosis
KCKCC Bannister Spring 2011- chapter 3
| Question | Answer |
|---|---|
| What is the net movement of molecules or ions from regions of high concentration to low concentration? | Diffusion |
| Diffusion is ________ transport? | Passive |
| Energy for diffusion is _________ energy of the molecules or ions. | Kinetic |
| Cellular metabolism(does or does not?) provide energy for diffusion? | does not |
| Is ATP needed for diffusion? | Yes |
| What is the main constituent of the plasma membrane structure? | phospholipids |
| The membrane is often called a _______________ _______________. | phospholipid bi-layer |
| Consistency of membrane is like________. | olive oil |
| Substances that can diffuse through the phospholipid bi-layer are? | oxygen, alcohol, nicotine, carbon dioxide, most drugs, oily substances |
| Substances that CANNOT diffuse through the phospholipid bi-layer are? | water, protein molecules, sodium, chloride. |
| Substances that cannot diffuse through the phospholipid bi-layer must enter or leave a cell by means of | protein ports or endocytosis or exocytosis |
| Integral proteins form ______ for passage of substances | pores |
| Peripheral proteins are either on the _______(extracellular or _______ side) or on the ___________(intracellular) side of the membrane. | Outside; interstitial; inside |
| External membrane proteins | cell recognition proteins. ie. ABO blood type proteins |
| Internal membrane proteins | cytoskeleton proteins. Provide Cell support. |
| Osmosis is the passage of_________ through a _______________ membrane. | Water; semi-permeable. |
| Osmosis is the passage of water(with or against?) its concentration gradient. | With |
| Osmosis is the passage of water(down or up?) its concentration gradient. | down |
| Osmotic pressure is a measure of___________ concentration. | solute |
| A solution with high osmotic pressure will absorb ( few or many?) molecules of water in osmosis. | many |
| Molarity and molality are measurements of the number of _________ __________ in a solution. | solute particles |
| Osmolality is a medical test for osmotic pressure in what body fluid? | blood plasma |
| Tonicity | the solute levels in a solution |
| Isotonic solution | contains same number of solute molecules as normal body cells. |
| Hypertonic solution | Contains more solute molecules than normal body cells. |
| Hypotonic solution | Contains fewer solute molecules than normal body cells. |
| Saline solution that is used in medical situations is a(an) __________ solution. | isotonic |
| Blood plasma is a(an) ___________ solution. | isotonic |
| The water of the Dead Sea and Great Salt Lake is a(an) ___________ solution. | Hypertonic |
| Tap water is a(an) ___________ solution. | hypotonic |
| An extracellular solution that does not cause cells to change volume is __________. | isotonic |
| An extracellular solution that causes cells to shrink is _________. | hypertonic |
| An extracellular solution that causes cells to expand is___________. | hypotonic |
| Most numerous solute particle in plasma | sodium ions |
| Ions in body fluids are often called | electrolytes |
| Osmolality test | time it takes a plasma(serum) sample to freeze |
| Freezing time | a measure of solute concentration. |
| Solute concentration in body fluids determines your body | fluid volume and blood pressure |
| Electrolyte test | most often ordered medical test |
| Four main electrolyte tests | Sodium(Na+), Potassium(K+), Chloride(Cl-) and CO2(bicarbonate) |
| The cations | sodium and potassium |
| The anions | Chloride and bicarbonate(CO2) |
Created by:
daisywiz
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