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42 Cards in this Set
- Front
- Back
Plasma membrain is.. |
Semi-permeable |
|
Selectivly allows molecules to pass through |
Semi permeable |
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Fatty acids within a plasma membrain |
Both saturated and unsaturated |
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Proteins that specialized in moving molecules across a membrain |
Transport protein. |
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Difference in the solute concentration between two areas |
Concentration gradient |
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Movement of molecules across membrain without energy |
Passive transport |
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Phospholipid bilayer is... |
Semi-permeable |
|
Movement of small hydrophobic non-pilot molecules through membrain, requires no energy |
Pasive transport-simple diffusion |
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Proteins that act as transporters to move |
Passive transport- facilitated diffusion |
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Types of protein channels |
Gated and leak channels |
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Leak channel |
Always open |
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Only let's specific molecules inside the cell. |
Gated channel |
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Movement of water molecules through the membrain |
Osmosis |
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Protein channel that water moves through- form of osmosis |
Aquaporin |
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Amount of solutes within or outside the cell |
Osmolarity |
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Types of solutes |
Hypotonic solution, isotonic, hypertonic |
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More solute inside the cell. Water is going to enter the cell. |
Hypotonic solution |
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Equal amount of solutes, water moves in and out of cell. |
Isotonic solution |
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Less solute inside the cell, water will be leaving the cell. |
Hypertonic solution |
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Requires energy for movement across membranes |
Active transport |
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Active transport moves________ |
Against the concentration gradient |
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Energy that active transport uses |
ATP |
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Forms of bulk transport |
Endocytosis, Exocytosis |
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Exocytosis |
Exiting the cell |
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Endocytosis |
Entering the cell |
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Vesicles bring molecules to exit the cell |
Exocytosis |
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Transports Large molecules/ sunstances using vacuoles |
Phagocytosis |
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Transports Small molecules/ substances into the cell using vesicles. |
Pinocytosis |
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Protein pump uses ATP to change shape allowed for transportation of the molecule through the membrane |
Primary active transport |
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Types of pumps for cell transport |
Uniport, symport, antiport |
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Transfers one molecule in one direction. |
Uniport |
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Symport |
Transfers two molecules in same direction. |
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Transfers two molecules in different directions |
Antiport |
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Transports 3 sodium out of cell and 2 potassium into cell using ATP |
Sodium potassium pump |
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Because sodium is being pushed through the sodium potassium pump, it drives a glucose through against its concentration gradient using momentum. |
Secondary active transport |
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There is a potential difference in voltage across their plasma membrain due to a combination of the pumps and leak channels. |
Membrane potential |
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The potential of a cell when its at rest |
Resting membrain potential |
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A cell wants to be __________ on the inside |
Negative |
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Cells that send out a lot of signals and has a lot of functions |
Excitable |
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Cells that do not do very much. |
Non-excitable |
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Amount of pumps in an average neuron |
1,000,000 pumps |
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Can be opened or closed depending a change in environment within the cell either |
Gated channels |