Cell membrane structure — key components?
Phospholipid bilayer, proteins, cholesterol, glycocalyx.
Phospholipid Bilayer — structure?
Two-layer membrane with hydrophilic heads, hydrophobic tails.
Membrane transport — energy use?
Passive: no; Active: yes.
Fluid Mosaic Model — description?
Dynamic membrane with lipids, proteins, cholesterol, carbohydrates.
Membrane potential — main ion?
Potassium (K+).
Integral Proteins — role?
Embed fully; facilitate transport and signaling.
Peripheral Proteins — function?
Attach temporarily; involved in signaling, shape.
Glycocalyx — composition?
Glycoproteins and glycolipids on cell surface.
Cholesterol — membrane role?
Modulates fluidity and stability.
Passive Transport — definition?
Substances move without energy, driven by gradients.
Test your knowledge with 10 questions on Cell Membrane Function and Transport.
1. What is the structure of the cell membrane primarily composed of?
2. What is the primary structural component of the cell membrane that forms its semi-permeable barrier?
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