Active Transport (AP)

Active transport involves the movement of substances _ their chemical gradient

• Down/with

• Up/against

• Both answers are correct

Against gradient transport involves the movement of substances move from areas of _ concentration to areas of _ concentration

• High, low

• Low, high

• Equal, equal

Active transport _ require energy from ATP or another source

• Does

• Does not

In addition to primary active transport, _ are forms of active transport. Select 2

• Simple diffusion

• Facilitated diffusion

• Exocytosis

• Endocytosis

• Osmosis

In primary active transport, substances are transported through _

• The phospholipid bilayer

• Transport proteins

• Vesicles

• Receptors

• Enzymes

Which of the following is a key difference between primary active transport and facilitated diffusion?

• Only primary active transport moves substances against their chemical gradient

• Only primary active transport requires transport proteins

• Only facilitated diffusion requires an energy source

• Only facilitated diffusion moves macromolecules

_ utilize transport proteins (facilitated diffusion and primary active transport). Select 2

• Nonpolar and hydrophobic molecules

• Polar and hydrophilic molecules

• Macromolecules/very large molecules

• Ions

How do energy sources such as ATP allow for primary active transport?

• They cause shape changes in transport proteins

• They cause shape changes in proteins associated with vesicle movement, fusion, and formation

• They prevent shape changes in transport proteins

• They prevent shape changes in proteins associated with vesicle movement, fusion, and formation

Na⁺/K⁺ pumps allow for primary active transport. Na⁺/K⁺ pumps are _ transport proteins that utilize ATP to transport _ across membranes

• Carrier, both Na⁺ and K⁺

• Channel, both Na⁺ and K⁺

• Carrier, just Na⁺

• Channel, just K⁺

The transport of Na⁺ and K⁺ by Na⁺/K⁺ pumps _ gradients

• Establishes and maintains electrochemical

• Establishes and maintains chemical

• Eliminates electrochemical

• Eliminates chemical

Tags

NGSS.HS-LS1-3