Cellular Transport

In the lungs, the movement of carbon dioxide out of cells and oxygen into cells can best be explained by which of the following processes?

• active transport
• diffusion
• endocytosis
• osmosis

Which of the following statements concerning diffusion and active transport is correct?

• both diffusion and active transport require cell energy.
• neither diffusion nor active transport requires cell energy.
• diffusion requires cell energy while active transport does not.
• active transport requires cell energy while diffusion does not.

The process in which the movement of materials across a membrane requires energy is 

• passive transport
• diffusion
• active transport
• facilitated diffusion

Process that moves any material from high concentrations to low concentrations is called 

• diffusion
• active transport
• endocytosis
• osmosis 

Process in which liquids from the surrounding area are taken into the cell is called

• phagocytosis 
• pinocytosis
• exocytosis
• passive transport

A solution that has a greater concentration than a cell it would be a ____ solution.

• Isotonic 
• Hypertonic 
• Hypotonic
• Heterogeneous 

What kind of material is transported through osmosis?

• carbon
• water 
• hydrogen ions
• suagr

How do substances move into or out of the cell through endocytosis?

• Substances are engulfed by vesicle, which crosses membrane. 
• Substances are engulfed by cell's plasma membrane and brought into the cell in a vesicle.
• Substances are engulfed by cell's plasma membrane to form a channel into the cell.
• Substances cross the cell membrane through protein channels.

All of the following are types of passive transport except 

• diffusion
• facilitated diffusion
• endocytosis
• osmosis

What is the role of ATP in the process of active transport?

• It lengthens the fatty acid chains in the membrane.
• It weakens the membrane, allowing molecules to pass through more easily.
• It provides the energy to transport the cell in its environment
• It provides the energy that cells need to move molecules against a concentration gradient