Questions and Answers
Facilitated diffusion requires __________________.
carrier proteins
Facilitated diffusion occurs ____.
Facilitated diffusion is used to transport _____
sugars
Osmosis is best defined as the movement of _____.
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Which of the following will pass through a cell membrane most easily?
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A red blood cell placed in a hypertonic solution will ________________.
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The sodium-potassium pump functions to pump _____.
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What is the source of energy used to power the sodium-potassium pump?
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During one cycle, the sodium-potassium pump binds and moves _____.
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A ligand is _________________________.
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Cell products that are to be secreted are processed and packaged into vesicles by the:
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A solution consists of a ____________ which is dissolved by the ______________.
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Large polar molecules, such as proteins are able to diffuse through the membrane easily.
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Which organelle uses oxygen during the process of cellular respiration?
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An atom with 11 neutrons, 11 protons, and 12 electrons would have a charge of
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How many ATPs does one FADH2 yield when it goes into the ETS (electron transport system)?
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The osmolality of a red blood cell is __________________.
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Red blood cells in an isotonic solution are _____.
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Red blood cells put in a hypertonic solution will _______________________
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Red blood cells put in a hypotonic solution will _______________________
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Study Notes
Facilitated Diffusion
- Requires carrier proteins to transport substances across cell membranes.
- Occurs in either direction depending on the concentration gradient of the molecule, not restricted to one side.
Osmosis
- Defined as the movement of water molecules from an area of low solute concentration to an area of higher solute concentration.
- Osmolarity of red blood cells is approximately 300 mOsmoles.
Membrane Permeability
- Small nonpolar molecules pass through cell membranes more easily than small polar molecules.
- Large polar molecules, like proteins, cannot diffuse easily through the membrane.
Red Blood Cell Behavior
- A red blood cell placed in a hypertonic solution will shrink due to water loss.
- In isotonic solutions, red blood cells maintain a lozenge shape.
- In hypotonic solutions, red blood cells undergo hemolysis and may burst.
Sodium-Potassium Pump
- Functions to transport sodium ions out of the cell and potassium ions into the cell.
- Powered by the hydrolysis of ATP.
- During one cycle, it moves 3 Na+ ions out and 2 K+ ions into the cell.
Ligands
- A ligand is a small molecule that binds to a membrane-bound receptor, initiating a cellular response.
Cellular Structures
- Secretory products are processed and packaged into vesicles by the Golgi Complex.
- Mitochondria use oxygen for cellular respiration.
Solutions
- A solution consists of a solute, which is dissolved by a solvent.
Atomic Charge
- An atom with 11 neutrons, 11 protons, and 12 electrons has a charge of -1 due to the excess of electrons.
Energy Yield in Cellular Metabolism
- One FADH2 yields 2 ATP when it enters the electron transport system.
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Description
Test your knowledge on facilitated diffusion with these flashcards covering essential terms and concepts from Chapter 5 of your biology textbook. Each card presents a question related to the mechanisms and components involved in this process.
