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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| show | A phospholipid bi-layer with proteins embedded throughout
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| What is a phospholipid bi-layer? | show 🗑
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| What is a protein called that spans across the entire phospholipid bilayer plasma membrane? | show 🗑
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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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| show | Semipermeable
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| What kind of particles can easily pass through a cells plasma membrane? | show 🗑
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| show | Highly charged or very big particles (unless they are aided by something that spans the membrane such as a receptor protein)
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| show | Diffusion or facilitated transport
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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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| What does it mean when something "moves along it's gradient"? | show 🗑
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| show | To move against the gradient is to move from low concentration to high concentration
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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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| What is active transport? | show 🗑
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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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| show | No, Facilitated Transport does not require energy because it goes along with the natural flow particles along their gradient
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| show | Active Transport and Facilitated Transport
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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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| What is exocytosis? | show 🗑
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| What is phagocytosis? | show 🗑
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| show | The cell eats something (usually a pathogen/bacteria), the thing eaten is then inside the cell surrounded by a small membrane bubble which is then fused with lysosomes that release their contents and digest everything in the bubble making a phagolysosome
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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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