SB Cellular Processes

Front

What type of solution is pure water?

Back

Hypotonic solution, as it has little to no solutes.

Front

What is required to pump a solute across a membrane against its gradient?

Back

Active transport, which requires the cell to expend energy.

Front

What happens to a cell with 25% NaCl when placed in a 5% NaCl solution?

Back

The solution is hypotonic and the cell will swell.

Front

What does Diagram F in Figure 3-1 represent?

Back

Equilibrium.

Front

Where does the energy used in active transport come from?

Back

It is released from the breakdown of food.

Front

Define osmosis.

Back

The movement of water across a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

Front

What is passive transport?

Back

The movement of substances across a cell membrane without the use of energy, following the concentration gradient.

Front

What is the difference between hypotonic and hypertonic solutions?

Back

Hypotonic solutions have a lower concentration of solutes compared to the cell, causing it to swell; hypertonic solutions have a higher concentration, causing the cell to shrink.

Front

What is diffusion?

Back

The process by which molecules spread from areas of high concentration to areas of low concentration.

Front

What role do gated channels play in cellular transport?

Back

Gated channels regulate the flow of ions and molecules across the cell membrane, opening or closing in response to specific signals.