Cell Transport Review Practice

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a type of passive transport that allows substances to cross membranes with the assistance of special proteins called transport proteins.

Front

What is the difference between active transport and passive transport?

Back

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

Front

Define osmosis.

Back

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

Front

What happens to a cell in an isotonic solution?

Back

In an isotonic solution, water moves in and out of the cell at equal rates, maintaining cell size and shape.

Front

What is a hypertonic solution?

Back

A hypertonic solution has a higher concentration of solutes outside the cell than inside, causing water to move out of the cell, leading to cell shrinkage.

Front

What is a hypotonic solution?

Back

A hypotonic solution has a lower concentration of solutes outside the cell than inside, causing water to move into the cell, which may lead to cell swelling or bursting.

Front

What is pinocytosis?

Back

Pinocytosis is a form of endocytosis where the cell engulfs liquid from the surrounding environment, often referred to as 'cell drinking'.

Front

What is phagocytosis?

Back

Phagocytosis is a type of endocytosis where the cell engulfs large particles or other cells, often referred to as 'cell eating'.

Front

What is the role of transport proteins in facilitated diffusion?

Back

Transport proteins help specific molecules cross the cell membrane by providing a passageway, allowing substances that cannot directly diffuse through the lipid bilayer to enter or exit the cell.

Front

What is the concentration gradient?

Back

The concentration gradient is the difference in the concentration of a substance across a space, which drives the movement of molecules from areas of high concentration to areas of low concentration.