Georgia Biology Standards SB1d: Cellular Transport

Front

What is active transport in cellular processes?

Back

Active transport is the movement of substances across a cell membrane against their concentration gradient, requiring energy (usually from ATP).

Front

What is the role of the selectively permeable plasma membrane?

Back

The selectively permeable plasma membrane controls the movement of substances into and out of the cell, allowing some molecules to pass while blocking others.

Front

What is osmosis?

Back

Osmosis is the diffusion 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 a concentration gradient?

Back

A concentration gradient is the difference in the concentration of a substance across a space, which drives the movement of substances during diffusion.

Front

How does placing wilted lettuce in cold water affect its cells?

Back

Placing wilted lettuce in cold water causes water to enter the cells by osmosis, restoring turgor pressure and making the lettuce crisp again.

Tags

NGSS.HS-LS1-3

Front

What is diffusion in the context of cellular transport?

Back

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

Front

What factors affect the rate of diffusion?

Back

The rate of diffusion is affected by factors such as temperature, concentration gradient, surface area, and the size of the molecules.

Front

What is the difference between passive and active transport?

Back

Passive transport does not require energy and moves substances down their concentration gradient, while active transport requires energy to move substances against their concentration gradient.

Tags

NGSS.HS-LS2-3

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a type of passive transport that uses transport proteins to help move substances across the plasma membrane.

Tags

NGSS.HS-LS2-3

Front

What is the significance of turgor pressure in plant cells?

Back

Turgor pressure is the pressure of the cell contents against the cell wall, which helps maintain the plant's structure and rigidity.

Tags

NGSS.MS-LS1-2