Chapter 3 Cellular Transport Review for State Test

How does water move across a cell membrane that has solutions of different concentrations on either side?

• facilitated diffusion

• endocytosis

• active transport

• osmosis

Which of the following BEST describes the process shown in the diagram?

• oxygen gas diffuses through a cell membrane

• oxygen gas moves through a cell membrane by facilitated diffusion

• oxygen gas moves across a cell membrane by the process of osmosis

• oxygen gas moves across a cell membrane by active transport

Saltwater fish have cells that are adapted to living in water with a high solute concentration. Which of the following would MOST likely happen to the cells of a saltwater fish if the fish were placed in freshwater?

• the cells would swell and burst due to osmosis

• the cells would shrivel up due to osmosis

• the cells would adapt to the concentration difference with no visible change

• the cells would lost salt through their cell membranes by diffusion.

In the diagram above, the concentration of ions and molecules outside the cell is MOST likely ---

• twice as high as the concentration of ions and molecules inside the cell

• the same as the concentration of ions and molecules inside the cell

• lower than the concentration of ions and molecules inside the cell

• decreasing at a greater rate than the concentration of ions and molecules inside the cell

A researcher is studying Solution A, a body fluid that contains 0.8% sodium. Which of these solutions containing sodium is hypertonic to Solution A?

• 0.8%

• 0.5%

• .07%

• 1.8%

Active transport of materials through a membrane against a concentration gradient requires ___.

• a carrier protein and energy

• energy only

• an isotonic solution

• a carrier protein only

A student with swollen gums gargles with warm salt water and experiences decreased swelling. Which statement best explains what has occurred?

• the high temperature of the warm salt water kills all infection causing microbes

• the saltwater solution is absorbed by cells in the gums

• the water in the gums moves from a high to a low concentration of water

• the salt in the saltwater solution is transferred into the cells through passive transport

A container is separated into two parts by an artificial membrane. A sugar solution is placed inside the membrane. Water is poured around the outside of the membrane. The diagrams show the sugar and water molecules at the beginning of the experiment (left) and after 1 hour (right). No energy was added to the system during the experiment. What process within living cells does this experiment model?

• osmosis

• active transport

• protein channeling

• facilitated transport

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

Which of the following statements is correct?

• Active transport requires cellular energy, but passive transport does not

• Passive transport requires cellular energy, but active transport does not

• Both passive transport and active transport require cellular energy

• Neither passive transport nor active transport requires cellular energy