Cell Transport

What is an example of a substance that moves via diffusion?

• Carbon dioxide

• Oxygen

• Glucose

• Sodium ions

What is cell transport?

• The process of cell division

• The movement of substances across the cell membrane

• The synthesis of proteins within the cell

• The replication of DNA during cell division

What is diffusion?

• Diffusion is the process by which molecules move from an area of high concentration to an area of low concentration until equilibrium is reached.

• Diffusion is the movement of molecules against a concentration gradient.

• Diffusion is the process of molecules being absorbed by a solvent.

• Diffusion is the process of molecules being repelled by each other.

What is the role of transport proteins in cell transport?

• Transport proteins facilitate the movement of specific molecules across the cell membrane, either passively or actively, depending on the type of transport.

• Transport proteins are responsible for synthesizing new proteins within the cell.

• Transport proteins act as enzymes to speed up chemical reactions in the cell.

• Transport proteins are involved in the replication of DNA during cell division.

What is facilitated diffusion?

• A type of active transport that requires energy to move molecules across the cell membrane.

• A type of passive transport that uses transport proteins to help move molecules across the cell membrane without using energy.

• A process that involves the movement of water molecules only through the cell membrane.

• A method of transporting large molecules by engulfing them in the cell membrane.

What is the difference between passive and active transport?

• Passive transport requires energy to move substances against the concentration gradient.

• Active transport occurs along the concentration gradient without energy.

• Passive transport does not require energy and occurs along the concentration gradient.

• Active transport is a form of passive transport.

What is hypertonic solution?

• A solution with a lower concentration of solutes compared to the inside of the cell, causing water to move into the cell and leading to cell swelling.

• A solution with an equal concentration of solutes compared to the inside of the cell, resulting in no net movement of water.

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

• A solution that contains only water and no solutes, resulting in cell dehydration.

How does temperature affect the rate of diffusion?

• Higher temperatures decrease the kinetic energy of molecules, leading to a slower rate of diffusion.

• Higher temperatures increase the kinetic energy of molecules, leading to a faster rate of diffusion.

• Temperature has no effect on the rate of diffusion.

• Lower temperatures increase the rate of diffusion.

What is isotonic solution?

• A solution where the concentration of solutes is higher inside the cell than outside, causing water to move into the cell.

• A solution where the concentration of solutes is equal inside and outside the cell, resulting in no net movement of water.

• A solution that causes cells to shrink due to loss of water.

• A solution that has no solutes and is purely water.

What is osmosis?

• The movement of solute molecules from high concentration to low concentration.

• The diffusion of water molecules across a selectively permeable membrane from an area of low solute concentration to an area of high solute concentration.

• The process of active transport of ions across a membrane.

• The absorption of nutrients by plant roots.