cell transport homework

14. The movements of solutes across a cell membrane is tracked. It is noted that an equal amount of solutes are entering the cell as leaving the cell. This pattern is maintained for a considerable period of time. This observation explains a cell ____. a) undergoing passive facilitated diffusion. b) using osmosis. c) in the middle of active transport using a protein pump. d) at equilibrium.

using osmosis

30. Oxygen moves through stomata from a high concentration in the air to a lower concentration in the leaf. This is an example of which type of transport? a) Diffusion b) Osmosis c) Active transport d) Ion pump

Diffusion

23. The difference between simple diffusion and facilitated diffusion is that: a) During facilitated diffusion substance moves through the proteins of the membrane. b) Facilitated diffusion requires ATP for transport of substances. c) During facilitated diffusion substance moves from lower to higher concentration. d) All of the above.

During facilitated diffusion substance moves through the proteins of the membrane

26. Molecules that are too large to be moved across a cell membrane can be removed from the cell by which of the following? a) Diffusion b) Osmosis c) Endocytosis d) Exocytosis

Endocytosis

25. Active transport is one way for molecules to move across a plasma membrane. When active transport is used to move molecules, what is required? a) Concentration gradient b) Very small molecules c) Energy that the cell provides d) Osmosis

Energy that the cell provides

27. Which of the following processes is dependent upon the Golgi apparatus for transport of materials across the cell membrane? a) Receptor-mediated endocytosis b) Pinocytosis c) Phagocytosis d) Exocytosis

Exocytosis

15. One of the leading causes for autoimmune disorders is a result of various cells in the body not possessing the correct __________ that is recognized by the white blood cells of the body. a) Glycoproteins b) Carrier Proteins c) Glycolipids. d) Mitochondrial DNA

Glycoproteins

10. Facilitated diffusion carrier proteins and cell membrane pumps both a) carry out active transport. b) transport substances against their concentration gradients. c) are specific to the kinds of substances they transport. d) require an input of energy.

are specific to the kinds of substances they transport

29. Passive transport occurs when small particles move from a) outside a cell to inside a cell. b) areas of lower concentration to areas of higher concentration. c) areas of higher concentration to areas of lower concentration. d) inside a cell to outside a cell.

areas of higher concentration to areas of lower concentration

8. The primary function of polysaccharides attached to the glycoproteins and glycolipids of animal cell membranes is a) make the cell membrane harder to move through. b) aids in cell to cell communication. c) speed up the metabolism of the cell. d) to secrete materials out of the cell.

b) aids in cell to cell communication.

7. Particles move through a cell's membrane protein channels from low concentration to high concentration. This process is called __________ . a) diffusion b) osmosis c) active transport d) passive transport

b) osmosis

4. A substance that moves by passive transport tends to move a) away from the area of equilibrium. b) away from the area where it is less concentrated. c) away from the area where it is more concentrated. d) toward the area where it is more concentrated.

c) away from the area where it is more concentrated.

6. Which process always involves the movement of materials from inside the cell to outside the cell? a) phagocytosis b) exocytosis c) endocytosis d) osmosis

c) endocytosis

2. Which of the following is a function of the cell membrane? a) Breaks down lipids, carbohydrates, and proteins from foods. b) Stores water, salt, and proteins. c) Keeps the cell wall in place. d) Regulates the movement of materials into and out of the cell.

d) Regulates the movement of materials into and out of the cell.

18. A cell does not need to use energy during a) exocytosis b) endocytosis c) facilitated diffusion d) active transport

facilitated diffusion

1. Which of the following functions as an energy reserve molecule and is an important component of cell membranes? a) Lipids b) Carbohydrates c) Proteins d) Nucleic acids

a) Lipids

16. Energy released by the electron transport chain is used to pump H+ into the intermembrane space of the mitochondria in eukaryotic cells. This is an example of what kind of transport? a) Active. b) Facilitated diffusion. c) Exocytosis. d) Endocytosis.

Active

32. What do the three transport processes illustrated above have in common? a) All three require a transport protein that will change shape. b) The molecules that are shown are moving against the concentration gradient. c) All three require the use of energy from ATP. d) All three require proteins that are specific for the molecule being transported.

All three require a transport protein that will change shape

22. Which of the following is the term for the diffusion of water across a selectively permeable membrane? a) Osmosis. b) Osmotic pressure. c) Active transport. d) Facilitated diffusion.

Osmosis

17. _______ is the ______ of water through a selectively permeable membrane (such as a cell membrane). a) Bulk transport, absorption b) Diffusion, pumping c) Osmosis, diffusion d) Active transport, movement

Osmosis, diffusion

11. Which of the following statements reveals how facilitated diffusion differs from simple diffusion? a) Particles move through cell membranes without the use of energy. b) Particles move within channel proteins that pass through cell membranes. c) Particles tend to move from high concentration to lower concentration. d) Particles tend to move more slowly that they would be expected to move.

Particles tend to move more slowly that they would be expected to move

28. The mechanism of transport in which any solid material or cell is engulfed by the cell through vesicle formed by the cell membrane: a) Receptor-mediated endocytosis b) Pinocytosis c) Phagocytosis d) Exocytosis

Phagocytosis

33. What kind of molecules need the help of either carrier proteins or protein channels in order to diffuse (no energy required) across the membrane? a) Large clusters of organic material. b) Polar molecules. c) Small nonpolar molecules. d) Products leaving the cell in vesicles.

Polar molecules

20. You've discovered a new molecule, called Go-kingsase that helps moves solute from an area of high concentration to an area of low concentration. Which macromolecule group would this new molecule belong to? Which type of transport is this? a) Protein; active b) Lipid; passive c) Lipid; active d) Protein; passive

Protein, passive

19. Which of the following are characteristics of ALL active transport? a) Require an energy input from the cell; move molecules from low to high concentration. b) Don't require an energy input from the cell; move molecules from low to high concentration. c) Don't require an energy input from the cell; move molecules from high to low concentration. d) Require an energy input from the cell; move molecules from high to low concentration.

Require an energy input from the cell; move molecules from high to low concentration

13. The cell membrane contains channels and pumps that help move materials from one side to the other. The protein channel that facilitates the movement of water across the membrane is called a) cholesterol. b) aquaporin. c) a proton pump. d) glycoprotein.

a proton pump

31. Use the picture to answer this question. What choice best describes the passive transport of molecules across the membrane of this cell? a) Both water and salt will leave the cell. b) Water will leave the cell and cell will shrink. c) Both water and salt will enter the cell. d) Water will enter the cell and cell will swell.

Water will enter the cell and cell will swell

24. Mammalian blood contains the equivalent of 0.15 M NaCl. Seawater contains the equivalent of 0.45 M NaCl. What will happen if red blood cells are transferred to seawater? a) Water will leave the cells, causing them to shrivel and collapse. b) The blood cells will take up water, swell, and eventually burst. c) NaCl will be exported from the red blood cells by facilitated diffusion. d) The blood cells will expend ATP for active transport of NaCl into the cytoplasm.

Water will leave the cells, causing them to shrivel an collapse

21. If an animal cell is surrounded by fresh water, what will happen to the cell? a) Solutes will move into the cell, causing it to burst. b) Water will move into the cell, causing it to burst. c) Solutes will move out of the cell, causing it to shrivel. d) Water will move out of the cell, causing it to shrivel.

Water will move into the cell, causing it to burst

5. Which of the following is an example of active transport? a) facilitated diffusion b) osmosis c) diffusion d) endocytosis

d) endocytosis

3. The movement of water molecules across a selectively permeable membrane is known as a) exocytosis. b) phagocytosis. c) endocytosis. d) osmosis.

d) osmosis.

12. Inside a cell, a vesicle containing protein hormones fuses with the cell membrane and releases its contents outside the cell. This process is called a) osmosis. b) diffusion. c) exocytosis. d) endocytosis.

diffusion

9. When the concentration of a substance in a cell is equal to the concentration in the surrounding fluid, this solution is ___________ to the cell. a) equitonic b) hypertonic c) hypotonic d) isotonic

hypotonic