Cell Transport

Front

What are lipids?

Back

Lipids are a group of macromolecules that are hydrophobic (water-repelling) and include fats, oils, and phospholipids, which are essential for cell membrane structure.

Front

What is active transport?

Back

Active transport is the movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration, using energy (ATP).

Front

What is osmosis?

Back

Osmosis is the process of moving water molecules through a selectively permeable membrane from an area of high water concentration to an area of low water concentration.

Front

What is the main difference between passive and active transport?

Back

Active transport requires energy to move substances against their concentration gradient, while passive transport does not require energy and moves substances along their concentration gradient.

Front

What does active transport require?

Back

Active transport requires energy, usually in the form of ATP, to move substances across the cell membrane.

Front

What is diffusion?

Back

Diffusion is the process by which molecules spread from an area of high concentration to an area of low concentration until they are evenly distributed.

Front

What is a concentration gradient?

Back

A concentration gradient is the difference in the concentration of a substance between two areas, which drives the movement of molecules during diffusion and osmosis.

Front

What is a selectively permeable membrane?

Back

A selectively permeable membrane is a barrier that allows certain substances to pass through while blocking others, crucial for maintaining homeostasis in cells.

Front

What is endocytosis?

Back

Endocytosis is the process by which cells engulf substances from their external environment, bringing them into the cell in vesicles.

Front

What is exocytosis?

Back

Exocytosis is the process by which cells expel materials in vesicles, releasing them into the external environment.