Transport Mechanisms in Cells

The video tutorial by Miss Oz covers the movement of molecules, focusing on passive and active transport, diffusion types, osmosis, and solution types. It explains the differences between passive and active transport, including the role of energy and transport proteins. The tutorial also discusses osmosis and the effects of hypertonic, isotonic, and hypotonic solutions on cells. Additionally, it covers active transport mechanisms like endocytosis and exocytosis, detailing processes such as phagocytosis and pinocytosis.

What is the main difference between passive and active transport?

• Passive transport moves molecules from high to low concentration without energy, while active transport requires energy to move molecules from low to high concentration.

• Passive transport requires energy, while active transport does not.

• Active transport moves molecules from high to low concentration, while passive transport does the opposite.

• Both passive and active transport require energy.

Which of the following is an example of passive transport?

• Endocytosis

• Phagocytosis

• Facilitated diffusion

• Exocytosis

In facilitated diffusion, what is used to help move molecules across the cell membrane?

• Lipid bilayer

• Osmotic pressure

• Transport proteins

• ATP

What happens to a cell in a hypertonic solution?

• The cell shrinks as water moves out.

• The cell remains the same size.

• The cell absorbs more solutes.

• The cell swells and bursts.

Which type of solution causes no net movement of water into or out of the cell?

• Supersonic

• Hypotonic

• Isotonic

• Hypertonic

What is the primary function of active transport?

• To allow passive movement of ions.

• To facilitate the diffusion of water across the membrane.

• To move molecules from low to high concentration using energy.

• To move molecules from high to low concentration without energy.

Which process involves the cell taking in liquids?

• Phagocytosis

• Pinocytosis

• Exocytosis

• Facilitated diffusion

What is the role of receptor-mediated endocytosis?

• To expel waste products from the cell.

• To transport water across the cell membrane.

• To take in specific molecules using receptor proteins.

• To engulf large particles like bacteria.

What is the main purpose of exocytosis?

• To bring substances into the cell.

• To move molecules from high to low concentration.

• To facilitate the diffusion of gases.

• To expel materials from the cell using energy.

Which of the following is an example of exocytosis in the human body?

• Diffusion of oxygen into cells.

• Engulfing bacteria by white blood cells.

• Secretion of saliva by salivary glands.

• Absorption of nutrients in the intestines.