Cellular Transport Flashcard

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, without the use of energy.

Front

What happens to a person's tongue cells after eating salty food?

Back

The tongue cells lose water and shrink, a process known as crenation, due to the hypertonic nature of the salty food.

Front

What is a hypotonic solution?

Back

A hypotonic solution has a lower concentration of solutes compared to the inside of a cell, causing water to enter the cell and potentially leading to swelling or bursting.

Front

Which molecules can diffuse through the cell membrane?

Back

Oxygen and carbon dioxide can easily diffuse through the cell membrane due to their small size and nonpolar nature.

Front

What part of a phospholipid is hydrophilic?

Back

The head of a phospholipid is hydrophilic, meaning it is attracted to water.

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, requiring energy (ATP).

Front

What is osmosis?

Back

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

Front

What is the role of transport proteins in cellular transport?

Back

Transport proteins facilitate the movement of substances across the cell membrane, either passively or actively.

Front

What is the difference between diffusion and facilitated diffusion?

Back

Diffusion is the movement of molecules from high to low concentration without assistance, while facilitated diffusion requires specific proteins to help transport molecules.

Front

What is an isotonic solution?

Back

An isotonic solution has an equal concentration of solutes inside and outside the cell, resulting in no net movement of water.