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- Which of the following is correctly paired? Two answer choices are correct. osmosis= a type of active transport facillitated diffusion = a transport proteins are used to move substances across a membrane diffusion = a type of passive transportWhich of the following is true regarding bulk transport? ATP is required to pump molecules against the concentration gradient Bulk transport is an example of passive transport Transport of large quantities of materials ATP changes the shape of a protein channel during active transportGlucose enters the cell through a protein called a glucose transporter. It is an example of facilitated diffusion. Which of the following is false? The glucose flows with its gradient. The interior of the transporter has non polar residues. There are many types of glucose transporters. Energy is not required.
- Which of the following can transport more than one different type of ion or molecule across the cell membrane? Aquaporin Voltage-gated K+ channel Glucose carrier protein None of the aboveWhich of the following processes could result in the net movement of a substance into a cell, if the substance is more concentrated in the cell than in the surroundings? diffusion active transport osmosis facilitated diffusionIf the fluid within a cell contains a lower concentration of dissolved solutes compared to the external fluid surrounding the cell, we say that the cellular fluid is ________ relative to the external fluid, and water will ________ the cell. hypertonic / flow into hypertonic / flow out of hypotonic / flow into hypotonic / flow out of isotonic / have the same flow rate into and out of
- Match the following with the term that best describes them integral part of the plasma membrane can easily cross the semi-permeable plasma membrane cellular currency of cell that enables it to transport molecules against the concetration gradient (i.e active transport) act as channels carriers to transport polar molecules like sugars into cells A. phospholipids B. proteins C. ATP D. oxygenWhich of the following are features of facilitated diffusion? There may be more than one correct answer, select all that apply. Requires energy Movement assisted by proteins Can include passive diffusion Depends on ATP hydrolysis Can include ion transport down its concentration gradient in a cell (high to low concentration)When the nerves deliver a signal to contract, Ca++ (calcium ions) rush into the cell. The calcium ion influx causes specialized fibers to contract. Afterward, calcium ions are pumped out of the cell by calcium ATPases. What transport type(s) is occuring?s antiporter only ion gated transport followed by active transport active transport only ion gated transport only active transport followed by ion gated transport
- Which of the following statements about diffusion is correct? It is an active process in which molecules move from a region of lower concentration to one of higher concentration. It is very rapid over long distances. It requires an expenditure of energy by the cell. It is a passive process in which molecules move from a region of lower concentration to a region of higher concentration. It is a passive process in which molecules move from a region of higher concentration to a region of lower concentration.What type of function is performed by the sodium potassium pump, which directly uses ATP to move sodium and potassium against their concentration gradient? Group of answer choices Primary active transport Secondary active transport Facilitated diffusion Simple diffusionWhich of the following statements best describes the movement of molecules in a cell if its concentration on both sides is the same? Group of answer choices The molecules will stop moving across the membrane. The molecules will continue to move across the membrane in both directions. The molecules will move across the membrane to the outside of the cell. The molecules will move across the membrane to the inside of the cell.