Exploring Cells and Their Functions

What is the basic unit of life?

• Atom

• Molecule

• Cell

• Organism

What part of the cell controls what enters and leaves?

• Nucleus

• Ribosome

• Cytoplasm

• Cell membrane

How do plant cells use osmosis?

• Plant cells use osmosis to create new cells during growth.

• Plant cells use osmosis to produce energy through photosynthesis.

• Plant cells use osmosis to absorb nutrients from the soil.

• Plant cells use osmosis to maintain turgor pressure and regulate water balance.

What happens to a plant cell in a salty solution?

• The plant cell loses water and may undergo plasmolysis.

• The plant cell remains unchanged in size.

• The plant cell produces more chlorophyll.

• The plant cell absorbs water and swells.

What is plasmolysis?

• Plasmolysis is the expansion of the cell wall in response to water loss.

• Plasmolysis refers to the absorption of water by plant cells.

• Plasmolysis is the process of cell division in plants.

• Plasmolysis is the contraction of the protoplast of a plant cell as a result of loss of water from the cell.

What occurs to red blood cells in a hypotonic solution?

• Red blood cells become more rigid and less flexible in a hypotonic solution.

• Red blood cells shrink and become dehydrated in a hypotonic solution.

• Red blood cells swell and may burst (hemolysis) in a hypotonic solution.

• Red blood cells remain unchanged in a hypotonic solution.

What is hemolysis?

• Hemolysis is the process of blood clotting.

• Hemolysis is the increase of red blood cell count.

• Hemolysis is the breakdown of red blood cells.

• Hemolysis is the production of white blood cells.

What is the difference between diffusion and osmosis?

• Diffusion is the general movement of molecules; osmosis specifically refers to the movement of water across a membrane.

• Osmosis is the movement of all types of molecules, while diffusion is only for water.

• Diffusion requires energy input, whereas osmosis does not.

• Diffusion only occurs in gases, while osmosis occurs in liquids.

What is active transport?

• The process of molecules moving freely through the cell membrane without any barriers.

• The movement of molecules without energy from high to low concentration.

• Active transport is the movement of molecules across a cell membrane using energy to move them from low to high concentration.

• The passive diffusion of water across a membrane without energy usage.

How do cells move substances against their concentration gradient?

• Cells use passive transport to move substances.

• Cells rely on diffusion to transport substances.

• Cells utilize osmosis for substance movement.

• Cells move substances against their concentration gradient via active transport.