1) Identify all transport mechanisms that utilizes vesicles to transport molecules across plasma membrane. (Attention It can be more than one answer.) Please choose what applies! A) Osmosis B) Exocytosis C) Facilitated Diffusion D) Endocytosis E) Diffusion F) Active Transport 2) Identify all transport mechanisms that move particles against their concentration gradient. (It can be more than one answer) A) Endocytosis B) Diffusion C) Active Transport D) Exocytosis E) Osmosis F) Facilitated Diffusion
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Cells transport substances across their membranes. Choose TWO of the following four types of cellular transport: 1. Osmosis 2. Active transport 3. Facilitated diffusion 4. Endocytosis/exocytosis For each of the two transport types you choose, describe the transport process and explain how the organization and properties of cell membranes function in the movement of specific molecules across the membrane by that transport process (10 points each; 20 points total). Give an example molecule that is transported by that form of transport (5 points each; 10 points total). Note if the transport process requires energy (5 points each; 10 points total).
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Which of the following correctly describes some aspect of exocytosis or endocytosis? a. Endocytosis and exocytosis involve passive transport. b. The inner surface of a transport vesicle that fuses with or buds from the plasma membrane is most closely related to the inner surface of the plasma membrane. c. Exocytosis and endocytosis change the surface area of the plasma membrane. d. These two processes require the participation of mitochondria. e. Both processes provide a mechanism for exchanging membrane-impermeable molecules between the organelles and the cytosol.
Match the items to the correct answers in the key. Each answer may include more than one item. a. diffusion b. facilitated diffusion c. osmosis d. active transport Movement of water across a membrane.
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