Cell Transport

Which process involves the movement of molecules across the plasma membrane from areas of high to low concentration without any assistance or energy from the cell?

• active transport

• diffusion

• endocytosis

• metabolism

Macrophages engulf foreign particles from the bloodstream using energy through the process called phagocytosis. Why do macrophages require energy to engulf foreign particles?

• Foreign particles are large molecules.

• Foreign particles have complex body systems.

• Foreign particles need to be taken care of quickly.

• Foreign particles are organic molecules that can bind with DNA.

• Diagram A: active transport; Diagram B: active transport

• Diagram A: passive transport; Diagram B: active transport

• Diagram A: active transport; Diagram B: passive transport

• Diagram A: passive transport; Diagram B: passive transport

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What type of molecule diffuses across a selectively permeable membrane during the process of osmosis?

• carbon dioxide

• glucose

• water

• oxygen

Which table shows the correct pairing of a molecule with its function in maintaining homeostasis in the human body?

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Tags

NGSS.HS-LS1-3

• The protein transports a food molecule against the concentration gradient using energy.

• The protein transports a food molecule with the concentration gradient without using energy.

• The protein removes a toxin with the concentration gradient using energy.

• The protein removes a toxin against the concentration gradient without using energy.

Tags

NGSS.HS-LS2-4

Why is homeostasis important?

• It allows organisms to maintain a constant internal environment.

• It breaks down fats when carbohydrates are not available.

• It uses the energy from sunlight to make sugar from carbon dioxide and water.

• It is the process by which a less specialized cell becomes a more specialized cell type.

Tags

NGSS.HS-LS1-3

what process does the cell use proteins to transport large molecules, such as glucose, across the plasma membrane from areas of high to low concentration?

• ATP

• osmosis

• active transport

• facilitated diffusion

Healthy human beings can maintain their blood sugar levels within a narrow range of values, even after eating a large amount of carbohydrates. This is an example of what process?

• circulation

• digestion

• homeostasis

• metabolism

Tags

NGSS.HS-LS1-3