10 Questions
What type of molecules can easily cross the cell membrane?
Lipid soluble substances, small gas molecules, water, glucose
What is the term for the movement of materials from the area of low concentration to the area of high concentration?
Active transport
What provides the energy for the uphill movement of materials in active transport?
ATP
What is the term for the process by which the cell membrane takes in materials by infolding in the form of vacuoles?
Endocytosis
What are the two types of endocytosis?
Phagocytosis and pinocytosis
What is the basic chemical composition of the cell membrane?
Lipids and proteins
What is the structure proposed earlier for the cell membrane?
Lipid bilayer sandwiched between inner and outer layers of protein
What is the most accepted model for the structure of the cell membrane?
Fluid Mosaic Model
What is the role of the cell membrane in the movement of materials?
It contains charged pores through which movement of materials takes place, both by active and passive transport
What term is used to describe the property of the cell membrane that allows only selective substances to pass through it?
Differentially permeable or selectively permeable membrane
Test your knowledge of the composition and structure of the cell membrane, including the role of lipids, proteins, and carbohydrates. Explore the contributions of biologists to our understanding of this vital cellular boundary.
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