Unit 2 Cell Transport

Front

What is the hydrophilic portion of the cell membrane?

Back

The hydrophilic portion of the cell membrane refers to the phosphate heads of phospholipids that are attracted to water, allowing the membrane to interact with the aqueous environment.

Front

What type of transport occurs when solutes move with the concentration gradient without using energy?

Back

Passive Transport.

Front

What does it mean when a solution is isotonic to a cell?

Back

It means that the concentration of solutes is the same inside and outside the cell, resulting in no net movement of water.

Front

What is osmosis?

Back

Osmosis is the passive transport of water molecules through a selectively permeable membrane.

Front

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

Back

Hypertonic solutions have a higher concentration of solutes compared to the cell, causing water to exit the cell. Isotonic solutions have equal concentrations, and hypotonic solutions have a lower concentration of solutes, causing water to enter the cell.

Front

What is the role of a selectively permeable membrane?

Back

A selectively permeable membrane allows certain molecules to pass through while blocking others, maintaining the internal environment of the cell.

Front

What is active transport?

Back

Active transport is the movement of molecules against their concentration gradient, requiring energy (ATP) to occur.

Front

What is diffusion?

Back

Diffusion is the passive movement of molecules from an area of higher concentration to an area of lower concentration.

Front

What is the significance of homeostasis in cell transport?

Back

Homeostasis is the process by which cells maintain a stable internal environment, which is crucial for proper cell function and survival.

Front

What happens to a cell in a hypertonic solution?

Back

In a hypertonic solution, water moves out of the cell, causing it to shrink.