Term
| Structure of a cell plasma membrane |
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Definition
1. Phospholipid bilayer
2. Protein Islands
3. Selective Permeable |
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Term
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Definition
| cell membrane has some control over what can cross it, so that only certain molecules either enter or leave the cell. |
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Term
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Definition
Concentration gradient
High concentration to low concentration |
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Term
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Definition
| Diffusion of water across cell membrane |
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Term
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Definition
dissolves in solvent
In a salt/water solution, dissolved salt is the solute |
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Term
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Definition
solute dissolves in solvent
In a salt/water solution, water is the solvent |
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Term
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Definition
| is any mixture of liquids, gases, or solids in which the substances are uniformly distributed with no clear boundary between them |
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Term
| Describe: osmotic pressure |
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Definition
| tendency of water to move by osmosis |
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Term
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Definition
| measurement depicting 1/1000 of an osmole (express the number of particles in a solution) |
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Term
| Describe: facilitated diffusion |
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Definition
Passive Transport
Diffusion along membrane protein carriers |
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Term
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Definition
| Solutions move across membrane by hydrostatic pressure; influenced by molecule size |
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Term
| Describe: active transport |
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Definition
| movement against concentration gradient requiring metabolic energy |
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Term
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Definition
3 Na out/2 K in
Biochemical mechanism that uses energy derived from ATP to achieve the active transport of potassium ions opposite to that of sodium ions; also called sodium potassium ATP-ase |
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Term
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Definition
| Bulk uptake of material through the cell membrane |
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Term
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Definition
| Cells' ingestion of solid substances, such as other cells, bacteria, bits of necroses tissue, and foreign particles. |
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Term
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Definition
| Elimination of material from a cell through the formation of vacuoles |
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Term
| Tonicity (solution, solvent) |
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Definition
Isotonic
hypotonic
Hypertonic |
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Term
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Definition
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Term
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Definition
| a solution of lower osmotic pressure than another solution with which it is compared (opposed to hypertonic ). |
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Term
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Definition
| Having the higher osmotic pressure of two solutions. |
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Term
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Definition
reflects the number, not the type, of particles in a solution
1 Osm glucose solution contains avogadro's number of particles per kg of water |
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Term
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Definition
| Osmotic pressure or tension of a solution, usually relative to that of blood; a state of continuous activity or tension caused by muscle contraction beyond the tension related to physical properties of muscle. |
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Term
| RBC in Hypotonic solution (low solute concentration) |
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Definition
| Water enters the cell by osmosis causing the cell to swell or even burst (lyse) |
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Term
| RBC in isotonic solution (equal concentration to cell) |
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Definition
| Water moves into and out of the cell at the same rate. No net water movement occurs, and the cell shape remains normal |
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Term
| RBC in Hypertonic Solution (High solute concentration) |
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Definition
| Water moves by osmosis out of the cell and into the solution, resulting in shrinkage (crenation). |
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Term
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Definition
In balance
Healthy person is in homeostasis
Disease is loss of homeostasis |
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Term
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Definition
Opposite effect
Not enough hormone so negative feed back will make more hormones |
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Term
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Definition
exaggeration
a lot of hormone so positive feedback will make more |
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