Passive Transport

In passive transport, substances move across the cell membrane ________ the concentration gradient

• AGAINST

• ALONG

• WITH

• BETWEEN

What macromolecule is embedded into the lipid bilayer and helps to transport molecules?

• Carbohydrate

• Lipid

• Protein

• Nucleic Acid

Which describes a hypotonic environment?

• Too much water in the cell will cause the cell to burst - the percentage of water is higher outside the cell than inside the cell

• Too little water in the cell will cause the cell to shrink - the percentage of water is lower outside the cell than inside the cell

• Concentrations of water are equal inside and outside the cell

Which describes a hypertonic environment?

• Too much water in the cell will cause the cell to burst - the percentage of water is higher outside the cell than inside the cell

• Too little water in the cell will cause the cell to shrink - the percentage of water is lower outside the cell than inside the cell

• Concentrations of water are equal inside and outside the cell

The movement of particles from an area of high concentration to an area of low concentration

• active transport

• osmosis

• diffusion

• random movement

If a cell is placed in an environment with MORE oxygen OUTSIDE the cell than inside, the cell will...

• gain oxygen

• lose oxygen

• gain water

• lose water

The movement of materials that does NOT require energy is called...

• active transport

• passive transport

• massive transport

• proactive transport

When there is a high concentration of carbon dioxide inside of the cell, carbon dioxide would move through the cell membrane to the blood stream where there is a lower concentration of carbon dioxide. What type of cell transport is this?

• Diffusion

• Facilitated diffusion

• Active transport

• Endocytosis

Maribel has a beautiful saltwater aquarium at her house. One day, a new and inexperienced salesperson at the pet store sold her goldfish from the freshwater tank. When Maribel placed the fish in her aquarium, it was not able to survive.

What type of environment would the saltwater solution be (hypertonic, isotonic, or hypotonic) to the cells of the fish?

• hypotonic

• hypertonic

• Isotonic

What type of transport uses a transport protein?

• Osmosis

• Facilitated diffusion