Cell Transport

The cell membrane of the red blood cell will allow water, oxygen, carbon dioxide, and glucose to pass through. Because other substances are blocked from entering, this membrane is called

• Perforated

• Semi-permeable

• Non-conductive

• Permeable

Tags

NGSS.MS-LS1-2

The kidneys regulate the levels of many chemicals and ions in the body. Which term BEST describes this process?

• digestion

• circulation

• homeostasis

• meiosis

Which is an example of osmosis?

• potassium ions moving in and out of an animal cell

• carbon dioxide moving into the leaf of a plant cell

• oxygen moving into the bloodstream from the lungs

• water moving into the root cells of a plant

In humans, glucose is kept in balance in the bloodstream by insulin. Which concept does this best illustrate?

• adaptation

• homeostasis

• metabolism

• organization

A particular toxin prevents cellular production of usable energy. Cells that are affected by this toxin are unable to carry out many of their normal functions. If cells were exposed to this toxin, which of these processes would probably be least affected?

• mitosis

• diffusion

• respiration

• photosynthesis

When red blood cells are placed in distilled water, the cells swell as water molecules enter them. By what process do water molecules move into the cells?

• Facilitated Diffusion

• Active Transport

• Endocytosis

• Osmosis

Many bacteria live in freshwater. Which of these statements best describes what will happen when freshwater bacterial cells are placed in salt water?

• Water leaves the cell, causing the cell to expand

• Water leaves the cell, causing the cell to shrink

• Water enters the cell, causing the cell to expand

• Water enters the cell, causing the cell to shrink

Tags

NGSS.MS-LS1-2

NGSS.MS-LS1-5

A student designed an experiment to see if plants grow better when watered with a sugar solution. He divided the plants into six groups, measured the initial height of each plant, and calculated the average height for each group. Once a week, for two months, he watered the plants in each group using different sugar solutions for each plant group. At the end of the two months he measured the final height and calculated the average. The student's data is shown in the table. Which of these statements explains why the plants in Groups E and F died?

• The high sugar content caused too much water to move out of the root cells

• The high sugar content caused too much water to move into the root cells

• The high sugar content prevented the plant from capturing energy

• The high sugar content clogged the pores in the cell membranes

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

NGSS.MS-LS2-4

The diagram shows an animal cell in a beaker containing a solution of sugar and water. The cell membrane is permeable only to water. Which statement describes the relationship between the animal cell and the contents of the beaker?

• There is a higher concentration of water inside the cell than outside the cell.

• There is a higher concentration of sugar inside the cell than outside the cell

• There is an equal concentration of water inside the cell as outside the cell

• There is an equal concentration of sugar inside the cell as outside the cell

Tags

NGSS.MS-LS1-2

In which of the following ways does the plasma membrane regulate the entry of molecules into a cell?

• The membrane allows only certain molecules to move into the cell

• The membrane destroys most molecules so that they do not enter the cell

• The membrane changes only certain molecules into ions before they move into the cell

• The membrane allows most molecules to transfer energy to the cell without entering the cell