Exploring the Cell Membrane

This video tutorial covers the cell membrane, also known as the plasma membrane, and its crucial role in maintaining homeostasis by protecting the cell and regulating the internal environment. It delves into the structure of the cell membrane, focusing on the phospholipid bilayer and the fluid mosaic model. The tutorial also highlights the four key components of the cell membrane: phospholipids, proteins, carbohydrates, and cholesterol, explaining their functions. Finally, it discusses the concept of selective permeability, which allows certain molecules to pass through the membrane while restricting others.

What is another name for the cell membrane?

• Endoplasmic membrane

• Mitochondrial membrane

• Plasma membrane

• Nuclear membrane

Which part of the phospholipid is water-loving?

• Nonpolar tail

• Polar tail

• Hydrophilic head

• Hydrophobic tail

What is the arrangement of phospholipids in the cell membrane called?

• Phospholipid monolayer

• Phospholipid quadrilayer

• Phospholipid bilayer

• Phospholipid trilayer

What does the term 'fluid' in the fluid mosaic model refer to?

• Rigid structure

• Solid structure

• Immovable structure

• Movable and flexible structure

Which year was the fluid mosaic model developed?

• 1982

• 1992

• 1972

• 1962

What is the main function of cholesterol in the cell membrane?

• Provide energy

• Maintain fluidity

• Transport molecules

• Store genetic information

Which component of the cell membrane helps in the transport of large charged particles?

• Cholesterol

• Proteins

• Phospholipids

• Carbohydrates

What is the role of carbohydrates in the cell membrane?

• Structural support

• Fluidity maintenance

• Cell identification and signaling

• Energy production

What does 'selectively permeable' mean in the context of the cell membrane?

• Only water can pass through

• All particles can pass through

• No particles can pass through

• Some particles can pass through while others cannot

Which molecules can easily pass through the cell membrane without assistance?

• Oxygen and carbon dioxide

• Carbohydrates

• Large charged particles

• Proteins