Cell Membrane Transport Mechanisms

This video reviews the cell membrane and cell transport, focusing on their functions, structure, and types of transport. It covers passive transport mechanisms like diffusion and osmosis, and active transport requiring energy. The video also explains the effects of different solutions on cells and the role of ATP in energy transfer.

What is the primary function of the cell membrane?

• To store genetic information

• To produce energy for the cell

• To protect the cell and regulate the movement of substances

• To synthesize proteins

What is the role of proteins in the cell membrane?

• They provide structural support

• They help in the movement of molecules across the membrane

• They store energy

• They synthesize lipids

Which term describes a membrane that allows only certain molecules to pass through?

• Semi-permeable

• Permeable

• Non-permeable

• Impermeable

What is passive transport?

• Movement of molecules requiring energy

• Movement of molecules without energy input

• Transport of molecules using ATP

• Transport of molecules against the concentration gradient

Which process involves the movement of water across a membrane?

• Diffusion

• Facilitated diffusion

• Osmosis

• Active transport

What happens to a cell in a hypertonic solution?

• It shrinks

• It swells

• It bursts

• It remains the same size

In which type of solution do cells maintain their normal size?

• Hypotonic

• Isotonic

• None of the above

• Hypertonic

What is required for active transport to occur?

• No energy

• Only small molecules

• A concentration gradient

• Energy in the form of ATP

What does ATP stand for?

• Adenosine Diphosphate

• Adenine Triphosphate

• Adenosine Triphosphate

• Adenine Diphosphate

Which of the following is a characteristic of active transport?

• It involves the movement of water only

• It moves substances from high to low concentration

• It does not require energy

• It uses carrier proteins or pumps