Exploring Cell Transport Mechanisms

What is the primary function of the cellular membrane?

• To provide energy to the cell

• To control the movement of substances in and out of the cell

• To produce proteins

• To store genetic information

Tags

NGSS.MS-LS1-2

Which of the following best describes osmosis?

• The movement of solutes from an area of high concentration to low concentration

• The movement of water molecules through a selectively permeable membrane from an area of low solute concentration to high solute concentration

• The active transport of ions across a membrane

• The diffusion of gases across a membrane

Which of the following is an example of passive transport?

• Endocytosis

• Exocytosis

• Facilitated diffusion

• Sodium-potassium pump

Describe the role of carrier proteins in facilitated diffusion.

• They provide energy for the transport of molecules.

• They form a channel through which molecules can pass.

• They bind to specific molecules and change shape to transport them across the membrane.

• They actively pump molecules against their concentration gradient.

What is the main difference between active transport and passive transport?

• Active transport requires energy, while passive transport does not.

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

• Both require energy but in different forms.

• Active transport moves substances down their concentration gradient, while passive transport moves them against it.

How does the concentration gradient affect the rate of diffusion?

• A steeper concentration gradient increases the rate of diffusion.

• A steeper concentration gradient decreases the rate of diffusion.

• The concentration gradient has no effect on the rate of diffusion.

• The concentration gradient only affects active transport, not diffusion.

Which process involves the engulfing of large particles by the cell membrane?

• Osmosis

• Diffusion

• Phagocytosis

• Exocytosis

In which direction do water molecules move during osmosis?

• From an area of high solute concentration to low solute concentration

• From an area of low solute concentration to high solute concentration

• From an area of high water concentration to low water concentration

• From an area of low water concentration to high water concentration

What is the role of ATP in active transport?

• It acts as a channel for molecules to pass through.

• It provides the energy needed to move substances against their concentration gradient.

• It binds to molecules to facilitate their transport.

• It is not involved in active transport.

ATP is a form of energy.

• Passive Transport
• Active Transport

Tags

NGSS.HS-LS1-7