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14 Cards in this Set
- Front
- Back
Cystic Fibrosis is caused by...
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A faulty protein that normally functions as a chloride ion (Cl-) channel.
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Transport across membranes can occur in what 3 ways?
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1. Simple Diffusion
2. Facilitative Diffusion 3. Active Transport |
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What is the only method of transport across a membrane that requires energy.
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Active Transport
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What two gradients must be considered when studying membrane transport.
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Chemical and Electrical.
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What is the only method of transport that can move a substance up, or against, its gradient.
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Active Transport
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What substances can diffuse through membranes?
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1. Small molecules
2. Nonpolar molecules 3. Water |
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Facilitative Diffusion can occur via what two kinds of proteins?
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1. Carrier proteins
2. Channel proteins |
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What are two major types of ion channels?
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1. Ligand-Gated ion channels
2. Voltage-Gated ion channels |
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What is the energy source of active transport?
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ATP
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What is the energy source for indirect active transport?
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Concentration gradient of ions pumped out by direct active transport.
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What is an example of direct active transport?
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The Na+/K+ pump
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The Na+/K+ pump drives which substance into the cell and which substance out of the cell?
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The Na+/K+ pump drives K+ into the cell and Na+ out of the cell.
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Indirect Active Transport in Animals is coupled with what substance?
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Na
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Indirect Active Transport in Plants and Bacteria is coupled with what substance?
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H
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