Active transport moment and passive transport moment

 Q: What is the primary energy source for active transport?

  

A: ATP (adenosine triphosphate) is the primary energy source for active transport.


Q: Contrast active transport and passive transport based on energy requirements.


A: Active transport requires energy input, usually in the form of ATP, to move substances against their concentration gradient. Passive transport does not require energy and relies on the natural movement of particles from high to low concentration.


Q: Provide an example of active transport in cells.


A: The sodium-potassium pump actively transports sodium ions out of the cell and potassium ions into the cell, maintaining the cell's electrochemical gradient.


Q: What is the role of carrier proteins in active transport?


A: Carrier proteins in active transport facilitate the movement of molecules across the cell membrane against their concentration gradient by utilizing energy from ATP.


Q: How does passive transport differ from active transport in terms of direction and energy usage?


A: Passive transport moves substances along their concentration gradient, requiring no energy input. Active transport moves substances against their concentration gradient, expending energy.


Q: Explain the process of facilitated diffusion and its relation to passive transport.


A: Facilitated diffusion is a type of passive transport where substances move across the cell membrane with the help of carrier proteins, following their concentration gradient.


Q: In what situations is active transport crucial for maintaining cellular functions?


A: Active transport is essential for processes like nutrient absorption in the intestines, ion pump activity in nerve cells, and maintaining electrolyte balance in cells.


Q: How does osmosis, a form of passive transport, differ from simple diffusion?


A: Osmosis specifically involves the movement of water molecules across a selectively permeable membrane, while simple diffusion refers to the movement of any substance from an area of high concentration to low concentration.


Q: What is the significance of passive transport in maintaining cell homeostasis?


A: Passive transport processes, such as diffusion and osmosis, contribute to maintaining the internal balance and stability of a cell by allowing the movement of necessary substances without expending energy.

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