Questions and Answers
What is active transport?
Active transport
Water moves via osmosis _________.
from an area with a high concentration of water to one of lower concentration
What does passive transport not use for entry into a cell?
A transport protein
Why must active transport function continuously?
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Which transport mechanism can bring whole cells into a cell?
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Study Notes
Active Transport
- Involves the movement of molecules against their concentration gradient using energy, typically ATP.
- Essential for maintaining concentration differences across the plasma membrane.
Osmosis
- Water moves via osmosis from regions of high water concentration to regions of low water concentration.
- This process is vital for maintaining cell turgor and overall homeostasis.
Passive Transport
- Oxygen can enter a cell through passive transport processes without the aid of transport proteins, especially following oxygen deprivation.
- This process occurs naturally due to concentration gradients, enabling gas exchange.
Continuous Function of Active Transport
- Active transport mechanisms must operate continuously to counteract diffusion, which allows solutes to move randomly in all directions.
- Maintaining cellular concentrations of ions and nutrients relies on the continuous activity of these transport systems.
Phagocytosis
- A specific form of active transport that enables cells to engulf whole particles or other cells.
- Particularly important for immune responses and nutrient uptake in unicellular organisms.
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Description
Test your knowledge on cell transport mechanisms including active transport, osmosis, and passive transport. This quiz covers the fundamental processes essential for maintaining cellular homeostasis and concentration gradients. Assess your understanding of how these mechanisms work and their biological significance.
