5 Questions
What is the main function of the cell membrane?
To separate the intracellular fluid from the extracellular fluid
What is the composition of the cell membrane lipids?
Lipid Bi-Layers with cholesterol molecules floating
What are the characteristics of the tails of phospholipids?
Contain fatty acids and are water insoluble
What is the main feature of facilitated diffusion?
Requires specific carrier proteins
What is the process that allows the cell to take in large molecules and particles?
Endocytosis
Study Notes
Cell Membrane
- The main function of the cell membrane is to regulate what enters and leaves the cell.
Composition of Cell Membrane Lipids
- The cell membrane is composed of phospholipids, which are amphipathic molecules with hydrophilic (water-loving) heads and hydrophobic (water-fearing) tails.
Characteristics of Phospholipid Tails
- The tails of phospholipids are non-polar and hydrophobic, allowing them to interact with each other and form a barrier to water and ions.
Facilitated Diffusion
- Facilitated diffusion is a type of passive transport that uses transport proteins to move molecules down their concentration gradient.
Cellular Uptake of Large Molecules and Particles
- Phagocytosis is the process that allows the cell to take in large molecules and particles by engulfing them with the cell membrane and forming a vesicle.
Test your knowledge of cell physiology with this quiz by Dr. Nageeb. Topics covered include cell membrane, simple diffusion, facilitated diffusion, osmosis, active transport, endocytosis, and multiple choice questions. Perfect for students studying cell physiology.
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