IB Biology 1.3 & 1.4 - Membrane Structure & Transport - Interactive Lecture
Elec2ric Learning・2 minutes read
The cell membrane is a barrier with phospholipids and proteins that control movement in and out, with cholesterol in animal cell membranes maintaining fluidity. Different types of particle movement, including active transport, occur across the membrane through various mechanisms.
Insights
- The cell membrane, composed mainly of phospholipids and proteins, serves as a selective barrier regulating the passage of substances in and out of the cell, crucial for maintaining internal stability.
- Understanding the fluid mosaic model of the cell membrane reveals that its dynamic structure allows proteins to move within the lipid bilayer, influencing various cellular functions like transport and recognition, highlighting the complexity and adaptability of this essential cellular component.
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Recent questions
What is the function of the cell membrane?
Barrier separating cell components from exterior.
What are phospholipids in the cell membrane?
Primary components with polar heads and nonpolar tails.
What is the role of proteins in the cell membrane?
Various functions like transport and cell recognition.
What is the function of cholesterol in the cell membrane?
Controls membrane fluidity by stabilizing phospholipids.
What is the difference between passive and active transport across the cell membrane?
Passive does not require energy, active requires cellular energy.