In a passive process (passive transport) across a cell's plasma membrane, ______ differences drive the movement; while in an active process, the cell provides ______ to power the transport process. A. concentration, ATP B. ATP, concentration C. differential permeability , driving force D. driving force, differential permeability

In a passive process (passive transport) across a cell's plasma membrane, differences drive the movement; while in an active process, the cell provides to power the transport process. A. concentration, ATP B. ATP, concentration C. differential permeability , driving force D. driving force, differential permeability

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter3: Cell Structure And Function

Section: Chapter Questions

Problem 12RQ: Water moves via osmosis _______. a. throughout the cytoplasm b. from an area with a high...

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Which of the following methods of transport is being used to transfer the substance into the cell in the accompanying graph? a. diffusion down a concentration gradient b. osmosis c. facilitated diffusion d. active transport e. vesicular transport f. It is impossible to tell with the information provided.
Water moves via osmosis _______. a. throughout the cytoplasm b. from an area with a high concentration of other solutes to a lower one c. from an area with a low concentration of solutes to an area with a higher one d. from an area with a low concentration of water to one of higher concentration
During passive transport, substances will move across a selectively permeable membrane until… explain why A. There is no longer any energy to be used B. All solutes reach the other side of the membrane C. There is no more room inside of the cell D. Equilibrium is reached
Active transport must function continuously because a.facilitated transport opposes active transport b.not all membranes are amphiphilic c.diffusion is constantly moving solutes in opposite directions d.the cell needs ions outside the cell e.plasma membrane wear out
9. Match each of the following statements related to membrane transport processes to the appropriate term: passive transport, facilitated transport, active transport. More than one term may apply in a given situation. _a. Movement across the membrane is against the concentration gradient. _b. Proteins serve as "gates." _c. Expenditure of cellular energy is required. _d. Movement across the membrane is from a high to a low concentration.
Active transport must function continuously because__________.a. plasma membranes wear outb. cells must be in constant motionc. facilitated transport opposes active transportd. diffusion is constantly moving the solutes in the other direction
Active transport must function continuously because. a. plasma membranes wear out b. not all membranes are amphiphilic c. facilitated transport opposes active transport d. diffusion is constantly moving solutes in opposite directions
22. Which of the following statements about passive processes of membrane transport is true? a. cellular energy is not required b. substances move along its concentration gradient c. all require the aid of proteins during transport d. a and b e. a and c
If a cell is in an isotonic environment, then a. the cell will gain water and burst. b. no water will move across the membrane. c. the cell will lose water and shrink. d. osmosis still occurs, but there is no net gain or loss of cell volume.
2. Active transport must function continuously because__________.a. plasma membranes wear outb. not all membranes are amphiphilicc. facilitated transport opposes active transportd. diffusion is constantly moving solutes in oppositedirections
1.Which of the following is TRUE about the movement of water across membranes? a.Water migrates to an area of low salt concentration. b.Water migrates to an area with high lipid content c.Water migrates to an area with high salt concentration. d.Water migrates into and out of the cell at equal rates. 2. Which of the following molecules/ material can freely pass through the cell membrane's phospholipids? a.carbon dioxide b.lipids c.oxygen molecule
Active transport of a substance across a membrane requiresa. a gradient b. the expenditure of ATP c. water d. diffusion