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- 1. Multiple ChoiceCells need to bring in molecules to carry out cellular processes. Often, this requires moving the molecules across the cell membrane against the concentration gradient. How do these molecules get into the cell?passive transport by diffusionactive transport using ATPpassive transport by osmosisosmosis
- 2. Multiple ChoiceA person with swollen gums rinses his mouth with warm salt water, and the swelling decreases. Which of the following has occurred?The swollen gums have absorbed the saltwater solution.The saltwater solution lowers the temperature of the water in the gums.The salt in the solution has moved against the concentration gradient.The water in the gums has moved out due to the high concentration of salt in the solution.
- 3. Multiple ChoiceThe cell membrane of the red blood cell will allow water, oxygen, and carbon dioxide to pass through. Because other substances are blocked from entering, this membrane is calledperforatedsemi-permeablenon-conducivepermeable
- 4. Multiple Choice
Look at the diagram of a cross-section of a cell membrane below. The cell membrane controls movement of materials into and out of the cell. The following particles are moving from high concentration to low concentration and are using a carrier protein. How would you describe this type of movement across the membrane?simple osmosisactive transportsimple diffusionfacilitated diffusion - 5. Multiple ChoiceLook at the cross section of a cell membrane of a eukaryotic cell. H+ ions are being pumped from a low concentration to a high concentration. How do you describe this type of transport across the cell membrane?active transportpassive transportfacilitated diffusionco-transport
- 6. Multiple ChoiceIn pure water, a red blood cell from an animal will swell and burst, but a leaf cell from a plant will not. Which structure in the leaf cell is responsible for this difference?cell membranecell wallmitochondrionnucleus
- 7. Multiple ChoiceThe diagram below represents a cell and some molecules in its environment. Which molecule would require the use of energy in order to be brought into the cell?1234
- 8. Multiple ChoiceWhich activity can occur without the use of energy?contraction of muscle tissueprotein synthesis in a cellactive transport of mineralsmovement of water across a membrane
- 9. Multiple ChoiceThe diffusion of water across a selectively permeable membrane is calledactive transportfacilitated diffusionosmosisphagocytosis
- 10. Multiple ChoiceDuring diffusion molecules tend to moveup the concentration gradientfrom an area of lower concentration to an area of higher concentrationin a direction that doesn’t depend on concentrationdown the concentration gradient
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