10 Questions
What is the main function of the cell membrane?
To regulate the balance of substances inside and outside the cell
How does a concentration gradient affect the movement of molecules?
Molecules move from high concentration to low concentration
Which cellular structure is responsible for ensuring stability by monitoring and adjusting internal conditions?
Cell membrane
What is the primary driving force behind the movement of particles in diffusion?
Difference in concentration
In what direction do molecules move during diffusion?
From high concentration to low concentration
What is the main difference between osmosis and dialysis?
Osmosis involves the movement of water, while dialysis involves the diffusion of solutes
Which statement best describes the role of Lugol solution as an indicator in detecting starch?
Lugol solution and starch combine to form a dark blue or purplish color because iodine passes through the semipermeable membrane
In hypertonic solutions, how do cells react to the higher concentration of solute outside compared to inside?
Cells shrink as water moves out of them
What distinguishes passive transport from active transport across a membrane?
Active transport involves moving molecules down their concentration gradient, whereas passive transport moves molecules against their concentration gradient
How does the sodium-potassium pump function in terms of transporting ions across a cell membrane?
The sodium-potassium pump requires ATP to actively move sodium out and potassium into cells
Explore the smallest unit of living matter, cells, and learn how they maintain homeostasis. Discover the cell membrane's role in regulating the balance of substances and maintaining stability for proper function.
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