National 5 Biology - Cell transport

Animal cells left in a solution with a lower water concentration than their contents:

• Shrink

• Burst

• Become turgid

• Become plasymolysed

The table shows the concentration of three ions outside and inside a human cell. Name the process by which sodium ions move into this cell.

Name the type of molecule, found in a cell membrane, which is involved in moving ions by active transport.

The diagram shows a cell with a section of the cell membrane magnified. Molecule X is...

• Phospholipid

• Protein

• Cellulose

• Starch

Glucose molecules in low concentration in the kidney have to be moved into the bloodstream, where there is a higher concentration of glucose. The process responsible for this action is...

• Osmosis

• Diffusion

• Passive transport

• Active transport

Identify the animal cell shown which had been placed in a solution of higher salt concentration than its cell contents.

State the term used to describe the condition of cell 6.

Name the structure present in a plant cell which prevents it from busting when full of water.

The graph shows the concentrations of ions in a single-celled organism and the sea water

surrounding it. Use the graph to identify which of the following statements is correct.

• Sodium ions will move into the organism by active transport.

• Sodium ions will move out of the organism by diffusion.

• Potassium ions will move out of the organism by active transport.

• Potassium ions will move into the organism by active transport.

What is the name for movement of water from a high concentration outside the cell to a low water concentration inside the cell?