Transport Mechanisms in Cells

The video tutorial covers different types of cellular transport, including facilitated transport, active transport, endocytosis, and exocytosis. It explains how facilitated transport moves solutes with the concentration gradient using a carrier molecule, while active transport moves solutes against the gradient, requiring ATP. Endocytosis and exocytosis involve the movement of materials into and out of the cell, respectively. The tutorial also discusses factors affecting diffusion rates, such as temperature, and concludes with a review of cell membrane parts and transport types.

What is the main characteristic of facilitated transport?

• It uses a carrier molecule without ATP.

• It involves endocytosis.

• It moves solutes against the concentration gradient.

• It requires ATP.

Which of the following is an example of a molecule moved by facilitated transport?

• Sodium ions

• Glucose

• Potassium ions

• Chloride ions

What is required for active transport to occur?

• Only a membrane

• A carrier molecule and ATP

• A concentration gradient

• No energy input

Which of the following is a common example of active transport?

• Facilitated diffusion

• Osmosis

• Sodium-potassium pump

• Endocytosis

What is the process of taking in material into the cell by forming a vacuole called?

• Exocytosis

• Facilitated transport

• Endocytosis

• Active transport

How does exocytosis differ from endocytosis?

• Exocytosis is a form of passive transport.

• Exocytosis requires no energy.

• Exocytosis releases materials from the cell.

• Exocytosis involves intake of materials.

What effect does increasing temperature have on the rate of diffusion?

• It stops diffusion.

• It increases the rate.

• It has no effect.

• It decreases the rate.

Which of the following is NOT a factor affecting the rate of diffusion?

• ATP availability

• Temperature

• Concentration gradient

• Membrane thickness

What must you be able to do to finish this unit successfully?

• Ignore the types of solutions

• Only memorize the definitions

• Focus only on active transport

• Label cell membrane parts and define transport types

Which solution type comparison is NOT required to differentiate?

• Hypotonic-hypertonic

• Isotonic

• Hypotonic

• Hypertonic