Exploring the Process of Cell Diffusion

The video tutorial introduces the concept of cells and focuses on the cell membrane, also known as the plasma membrane. It explains the membrane's selective permeability and its composition of lipids, proteins, and carbohydrates. The process of diffusion is illustrated using an ink and water example, highlighting that it does not require energy. The video further explains how gases like carbon dioxide and oxygen move across the cell membrane through diffusion, driven by concentration gradients. Finally, it mentions that diffusion is one of several transport processes used by cells, with more to be discussed in subsequent videos.

What is the outer covering of a cell called?

• Nucleus

• Cytoplasm

• Cell wall

• Cell membrane

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What is the nature of the cell membrane?

• Impermeable

• Non-permeable

• Selectively permeable

• Fully permeable

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What are the main components of the plasma membrane?

• Lipids and proteins

• Carbohydrates and nucleic acids

• Water and salts

• Vitamins and minerals

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Which substances can freely move in and out of the cell?

• Proteins and lipids

• Carbohydrates and nucleic acids

• Gases and water

• Vitamins and minerals

What is the process called when molecules spread from an area of high concentration to an area of low concentration?

• Active transport

• Osmosis

• Endocytosis

• Diffusion

Does diffusion require energy?

• Only in plants

• Yes

• No

• Sometimes

What happens to carbon dioxide during cellular respiration?

• It converts into oxygen

• It stays inside the cell

• It moves out of the cell

• It moves into the cell

Why does oxygen move into the cell after respiration?

• Because of high concentration inside the cell

• Because of low concentration inside the cell

• Because of high concentration outside the cell

• Because of low concentration outside the cell

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What is the direction of gas movement during diffusion?

• No movement

• From low to high concentration

• From high to low concentration

• Randomly

What will be discussed in the next video?

• Cell division

• Photosynthesis

• Cellular respiration

• Other transportation methods in cells

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