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.
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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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