The membrane that surrounds cells and their organelles
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| What does a cells plasma membrane consist of? | show 🗑
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| What is a phospholipid bi-layer? | show 🗑
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| show | An intrinsic protein or an integral protein
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| What is a protein called that exists on the outer parts of the phospholipid bilayer plasma mebrane? | show 🗑
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| What is the name of the arrangement of the phospholipids and proteins within the plasma membrane? | show 🗑
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| What is the difference between permeable and semipermeable? | show 🗑
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| Is a cells plasma membrane permeable or semipermeable? | show 🗑
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| What kind of particles can easily pass through a cells plasma membrane? | show 🗑
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| What kind of particles cannot pass through a cells plasma membrane? | show 🗑
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| What are the two ways in which molecules can pass through a membrane? | show 🗑
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| show | By comparing it to changes in that molecules gradient (gradient referring to the differences in concentrations on both sides of the membrane)
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| show | To increase the gradient means to increase the difference in concentrations on both sides of the membrane
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| show | To move along the gradient is to move from high concentration to low concentration
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| What does it mean when something "moves against it's gradient"? | show 🗑
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| If a graph of the gradient vs the rate of a molecule to cross a membrane reaches a point where increasing the gradient no longer increases the rate of crossing, what does this signify? | show 🗑
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| show | You know that it has become saturated, meaning it is working at the maximum capacity and cannot work faster regardless of increases in the gradient
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| What is facilitated transport? | show 🗑
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| show | 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 concentration)
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| show | Facilitated transport refers to the assisting of a molecule to cross a membrane along it's gradient while active transport refers to the assisting of a molecule to cross a membrane against it's gradient
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| show | Yes, Active Transport requires energy (ATP) because it opposes the natural flow of particles along their gradient
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| Does Facilitated Transport require energy and why or why not? | show 🗑
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| What are the two types of carrier mediated transport systems? | show 🗑
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| Name which of the following that exhibits saturation kinetics: Active Transport or Facilitated Transport | show 🗑
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| show | Sodium Potassium ATPase pump
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| Name the two ways things can enter or exit a cell other than through carrier mediated transport systems | show 🗑
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| What is endocytosis? | show 🗑
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| show | Exocytosis is when the plasma membrane invaginates and breaks off in a fashion that allows things to exit the cell ("cytosis" can be remembered as "cell eating")
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| show | Phagocytosis is a special case of endocytosis which mainly occurs when white blood cells want to remove pathogens, bacteria, or debris
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| Summarize the process of phagocytosis. | show 🗑
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| show | 2: The inner membrane is arranged in shelf-like folds referred to as cristae
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| How many phospholipid bi-layers surround the nucleus (describe) | show 🗑
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