Flashcards- Ch 7 Active Transport

Front

Movement across the cell membrane can be passive.

Back

Passive transport does not require energy. Examples include diffusion, facilitated diffusion, and osmosis.

Front

Describe how movement across the cell membrane can be active.

Back

Active transport requires energy. It involves moving ions or molecules against the concentration gradient, from low to high concentration.

Front

Describe what is shown in each image of the diagram.

Back

The diagram shows passive transport as an easy downhill movement and active transport as a challenging uphill movement, indicating energy use.

Front

What does it mean to say active transport is energetically "uphill"

Back

Uses energy from ATP to move molecules from low to high concentration

Front

Direction of molecule movement in active transport

Back

From an area of low concentration to an area of high concentration

Front

Types of active transport commonly used in cells

Back

- Protein pumps (e.g., Na+ / K+ pump, H+ pump)
- Cotransport
- Endocytosis
- Exocytosis

Front

Explain what is happening in the red circle

Back

Illustrates the process of active transport, including protein pumps and ATP energy usage to move molecules from low to high concentration

Front

Sodium-Potassium Pump function

Back

Actively pumps Na+ ions out of the cell and K+ ions into the cell to maintain membrane potential.

Front

Discuss the concentration gradients of Na+ and K+ as they are moved using the Na+/K+ pump

Back

Both are moved against their concentration gradients.

Front

Pump cycle details of Sodium-Potassium pump

Back

In every pump cycle, 3 Na+ leave and 2 K+ enter the cell. This costs 1 ATP