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14 Cards in this Set

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