Transport Across Cell Membrane

What is the difference between passive and active transport?

• Passive Transport: Movement of substances across the membrane without the use of energy. Active Transport: Movement of substances across the membrane with the use of energy.

• Passive Transport: Movement of substances across the membrane with the use of energy. Active Transport: Movement of substances across the membrane without the use of energy.

• Passive Transport: Movement of substances into the cell. Active Transport: Movement of substances out of the cell.

• Passive Transport: Movement of substances out of the cell. Active Transport: Movement of substances into the cell.

List and describe two types of passive transport.

• 1. Osmosis: Movement of water across the membrane. 2. Diffusion: Movement of solute particles from an area of higher concentration to an area of lower concentration.

• 1. Active Transport: Movement of substances across the membrane with the use of energy. 2. Facilitated Diffusion: Movement of solute particles from an area of higher concentration to an area of lower concentration.

• 1. Osmosis: Movement of solute particles from an area of higher concentration to an area of lower concentration. 2. Diffusion: Movement of water across the membrane.

• 1. Active Transport: Movement of substances across the membrane without the use of energy. 2. Facilitated Diffusion: Movement of solute particles from an area of lower concentration to an area of higher concentration.

Define hypotonic.

• A solution with a higher solute concentration compared to the cell.

• A solution with a lower solute concentration compared to the cell.

• A solution with an equal solute concentration compared to the cell.

• A solution with a higher water concentration compared to the cell.

Define hypertonic.

• A solution with a higher solute concentration compared to the cell.

• A solution with a lower solute concentration compared to the cell.

• A solution with an equal solute concentration compared to the cell.

• A solution with a higher water concentration compared to the cell.

Define isotonic.

• A solution with a higher solute concentration compared to the cell.

• A solution with a lower solute concentration compared to the cell.

• A solution with an equal solute concentration compared to the cell.

• A solution with a higher water concentration compared to the cell.

True or False? Water moves in both directions (in and out of the cell) at all times.

• True

• False

Tags

NGSS.HS-LS1-3

The net movement of water takes place from the _____________ side to the _____________ side of the membrane.

• Hypotonic, hypertonic

• Hypertonic, hypotonic

• Isotonic, hypertonic

• Hypertonic, isotonic

What is facilitated diffusion? Is it active or passive transport?

• Facilitated diffusion is the movement of substances across the membrane with the use of energy.

• Facilitated diffusion is the movement of substances across the membrane without the use of energy.

• Facilitated diffusion is the movement of solute particles from an area of higher concentration to an area of lower concentration. It is a form of passive transport.

• Facilitated diffusion is the movement of solute particles from an area of lower concentration to an area of higher concentration. It is a form of active transport.

List and describe 3 types of active transport.

• 1. Osmosis: Movement of water across the membrane. 2. Diffusion: Movement of solute particles from an area of higher concentration to an area of lower concentration. 3. Facilitated diffusion: Movement of solute particles from an area of lower concentration to an area of higher concentration.

• 1. Endocytosis: Uptake of substances into the cell by engulfing them with the cell membrane. 2. Exocytosis: Release of substances from the cell by fusing vesicles with the cell membrane. 3. Sodium-potassium pump: Active transport of sodium ions out of the cell and potassium ions into the cell.

• 1. Active Transport: Movement of substances across the membrane with the use of energy. 2. Facilitated Diffusion: Movement of solute particles from an area of higher concentration to an area of lower concentration. 3. Osmosis: Movement of water across the membrane.

• 1. Diffusion: Movement of solute particles from an area of higher concentration to an area of lower concentration. 2. Facilitated diffusion: Movement of solute particles from an area of lower concentration to an area of higher concentration. 3. Endocytosis: Uptake of substances into the cell by engulfing them with the cell membrane.

What is meant by the term 'concentration gradient'?

• The movement of water across the membrane.

• A solution with a higher solute concentration compared to the cell.

• The difference in solute concentration between two areas, which determines the direction of movement of substances.

• The movement of solute particles from an area of higher concentration to an area of lower concentration.