Passive Transport

Front

What does permeable mean in the context of cell membranes?

Back

Permeable means that substances can pass through the membrane.

Front

What happens to a cell placed in a hypotonic solution?

Back

The cell will swell as water enters the cell.

Front

During osmosis, in which direction do water molecules move when a cell is in a hypertonic solution?

Back

Water molecules move out of the cell, causing the cell to shrink.

Front

What is the result of a cell being plasmolyzed?

Back

The cell has lost water and must have been in a hypertonic solution.

Front

What is the energy requirement for passive transport?

Back

Passive transport requires no energy.

Front

Define osmosis in the context of cell biology.

Back

Osmosis is the movement of water molecules across a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

Front

What is the difference between hypotonic, hypertonic, and isotonic solutions?

Back

Hypotonic solutions have a lower solute concentration than the cell, hypertonic solutions have a higher solute concentration, and isotonic solutions have equal solute concentrations.

Front

What is the role of the cell membrane in passive transport?

Back

The cell membrane acts as a barrier that selectively allows certain substances to pass through while blocking others.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a type of passive transport that uses protein channels to help move substances across the cell membrane.

Front

How does temperature affect the rate of passive transport?

Back

Higher temperatures generally increase the rate of passive transport due to increased molecular movement.