In each blank, try to type in the
word that is missing. If you've
typed in the correct word, the
blank will turn green.
If your not sure what answer should be entered, press the space bar and the next missing letter will be displayed. When you are all done, you should look back over all your answers and review the ones in red. These ones in red are the ones which you needed help on. Question: What does a cells plasma membrane of?Answer: A bi-layer with proteins embedded throughout Question: What is a bi-layer?Answer: A bi-layer refers to a phosphate anion head which is polar/hydrophilic and 2 lipid tails which are non-polar/hydrophobic Question: What is a protein called that spans across the entire phospholipid bilayer plasma ?Answer: An protein or an integral protein Question: What is a called that exists on the outer parts of the phospholipid bilayer plasma mebrane?Answer: An extrinsic protein or a peripheral Question: What is the name of the of the phospholipids and proteins within the plasma membrane?Answer: The Fluid Mosaic Model (referring to the fact that the phospholipids move about freely along the membrane in a fluid like fashion and the are fixed with limited mobility, creating an intuitive image similar to a mosaic) Question: What is the difference between permeable and ?Answer: Semipermeable means only certain molecules are able to pass (usually referring to a membrane) while permeable means anything can pass through Question: Is a cells plasma membrane or semipermeable?Answer: Question: What kind of particles can easily pass a cells plasma membrane?Answer: Small uncharged Question: What kind of particles cannot pass a cells plasma membrane?Answer: Highly charged or very big particles (unless they are aided by something that spans the such as a receptor protein) Question: What are the two ways in molecules can pass through a membrane?Answer: Diffusion or transport Question: How can the rate of a diffusion into the cell be measured?Answer: By comparing it to changes in that gradient (gradient referring to the differences in concentrations on both sides of the membrane) Question: What does it mean to the gradient?Answer: To increase the gradient means to the difference in concentrations on both sides of the membrane Question: What does it mean when "moves along it's gradient"?Answer: To move the gradient is to move from high concentration to low concentration Question: What does it mean when something "moves it's gradient"?Answer: To move against the gradient is to move from low concentration to high Question: If a graph of the gradient vs the rate of a to cross a membrane reaches a point where increasing the gradient no longer increases the rate of crossing, what does this signify?Answer: This signifies that the molecule is crossing via facilitated because there is a limiting factor in the form of something such as a protein/receptor Question: At the on a facilitated diffusion graph where the curve levels out, what do you know about the protein/receptor that was assisting in crossing the membrane?Answer: You know that it has saturated, meaning it is working at the maximum capacity and cannot work faster regardless of increases in the gradient Question: What is transport?Answer: Facilitated transport refers to the case where there is something assisting a to cross the membrane along it's gradient (from high concentration to low concentration) Question: What is transport?Answer: Active transport refers to the case where there is something assisting a molecule to cross the membrane against it's gradient (from low concentration to high ) Question: What is the difference between facilitated and active transport?Answer: Facilitated transport refers to the assisting of a molecule to cross a membrane along it's gradient while active refers to the assisting of a molecule to cross a membrane against it's gradient Question: Does Transport require energy and why or why not?Answer: Yes, Active Transport requires energy (ATP) because it opposes the natural flow of along their gradient Question: Does Facilitated Transport require and why or why not?Answer: No, Facilitated Transport does not require energy because it goes along with the natural flow particles along their Question: What are the two of carrier mediated transport systems?Answer: Transport and Facilitated Transport Question: Name of the following that exhibits saturation kinetics: Active Transport or Facilitated TransportAnswer: Question: What is the most popular protein receptor in the membrane that uses Active Transport?Answer: Sodium Potassium pump Question: Name the two ways can enter or exit a cell other than through carrier mediated transport systemsAnswer: Endocytosis and Question: What is ?Answer: Endocytosis is when the plasma membrane invaginates and breaks off in a fashion that allows things to enter the cell ("cytosis" can be remembered as eating") Question: What is ?Answer: Exocytosis is when the membrane invaginates and breaks off in a fashion that allows things to exit the cell ("cytosis" can be remembered as "cell eating") Question: What is ?Answer: Phagocytosis is a special case of endocytosis which mainly occurs when white blood want to remove pathogens, bacteria, or debris Question: the process of phagocytosis.Answer: The cell eats something (usually a pathogen/bacteria), the thing eaten is then inside the cell surrounded by a membrane bubble which is then fused with lysosomes that release their contents and digest everything in the bubble making a phagolysosome Question: How many bi-layers surround the mitochondria (describe)Answer: 2: The membrane is arranged in shelf-like folds referred to as cristae Question: How many bi-layers surround the nucleus (describe)Answer: 2: These two membranes have pores in them nuclear pores |
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