Cell Transport Assessment

What phenomenon is shown here?

• Osmosis

• Active transport

• Diffusion

• Endocytosis

The movement of ions against their concentration gradient requires energy and is called ____.

• Passive transport

• Facilitated diffusion

• Osmosis

• Active transport

Which substances pass through the phospholipid bilayer by simple diffusion?

• O₂ and CO₂

• Na⁺ ions

• Glucose

• K⁺ ions

What's going on here?

• Pinocytosis

• Phagocytosis

• Exocytosis

• Facilitated diffusion

When we say the membrane is "selectively permeable," we mean that

• some ions and large particles easily pass through.

• small, nonpolar molecules cannot pass through.

• some substances pass through more easily than others.

• glucose can easily pass through the phospholipid bilaryer.

The passage of ions through a channel protein from an area of high concentration to an area of lower concentration.

• Simple diffusion

• Active transport

• Facilitated diffusion

• Osmosis

• This is exocytosis.

• This is phagocytosis.

• This is facilitated diffusion.

• This is passive transport.

Over time, water will diffuse from ____.

• Side A to Side B

• Side B to Side A

If the circles represent solute, which side is hypertonic?

• Side A

• Side B

Duke University researcher, Peter Agre, discovered aquaporins, which speed the diffusion of ____.

• oxygen

• carbon dioxide

• water

• ions