Cell Transport Mechanisms

What is the process by which molecules move from an area of higher concentration to an area of lower concentration?

• Osmosis

• Diffusion

• Active transport

• Endocytosis

Which of the following is a type of passive transport? (Select all that apply)

• Phagocytosis

• Pinocytosis

• Facilitated diffusion

• Exocytosis

True or False: Active transport requires energy, while passive transport does not.

• True

• False

Fill in the blank: The movement of water across a semipermeable membrane is known as _______.

• Diffusion

• Osmosis

• Active transport

• Facilitated diffusion

In which direction do molecules move during diffusion?

• From low concentration to high concentration

• From high concentration to low concentration

• Randomly, with no specific direction

• Against the concentration gradient

Which of the following is an example of active transport?

• Sodium-potassium pump

• Osmosis

• Simple diffusion

• Facilitated diffusion

What is the role of carrier proteins in cell transport?

• They provide energy for active transport.

• They facilitate the movement of substances across the cell membrane.

• They create a barrier to prevent substances from entering the cell.

• They are involved in the synthesis of proteins.

Which of the following best describes endocytosis?

• The process of taking materials into the cell by infolding of the cell membrane.

• The process of expelling materials from the cell.

• The movement of water molecules across a membrane.

• The passive movement of molecules down their concentration gradient.

Tags

NGSS.HS-LS2-3

What is the function of the cell membrane in transport?

• It acts as a rigid structure to support the cell.

• It regulates the movement of substances in and out of the cell.

• It synthesizes proteins for the cell.

• It stores genetic information.

Which of the following is NOT a form of passive transport?

• Simple diffusion

• Facilitated diffusion

• Osmosis

• Endocytosis