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Make this a new day
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Week 3
My New Lesson
Grade Level:
9
Subject:
Biology
Topic:
Diffusion Rate
Objective:
Understand how the process of diffusion occurs in cells.
Apply the concept of homeostasis to the process of diffusion.
Understand how the surface area-to-volume ratio of a cell affects diffusion of materials into that cell.
Conduct an experiment, and gather and analyze data.
Other Information:
Big Idea for This Lesson Various transport mechanisms—diffusion, osmosis, and facilitated diffusion (passive transport) and exocytosis and endocytosis (active transport)—move substances across membranes.
Misconceptions The rate of diffusion is faster in small cells compared to large cells. [The rate is constant; materials have to cover less distance in a small cell than a large cell.]
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