B2.1.1 - Diffusion Flashcards Preview

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Flashcards in B2.1.1 - Diffusion Deck (14):
1

Where and from are particles more likely to move?

From a high concentration to a low concentration area

2

What is diffusion?

Diffusion is the net overall of particles from a region of high concentration to a region of low concentration

3

When does diffusion finish?

When the concentration fo particles is equal everywhere

4

What is a concentration gradient?

A measure of how concentrated something is

5

What is the concentration gradient when the concentration is equal everywhere?

0

6

Is energy needed for diffusion?

No

7

How does glucose and oxygen get into cells?

Diffusion

8

What is a way for substances to leave and enter cells?

Diffusion

9

Describe diffusion in cells

The particles enter the cell through the cell membrane from a region of high concentration to low concentration

10

What are the 3 factors that affect the rate of diffusion?

Distance, concentration gradient and surface area

11

Suggest how you could increase the rate of diffusion.

Decrease the distance the particles need to move
Increase the concentration gradient
Increase the surface area

12

Why does increasing the concentration gradient speed up the rate of diffusion?

The concentration gap is steeper, which means it is easier for the particles to move

13

Why does increasing the surface area speed up the rate of diffusion?

There is more space, so more particles can move at a time

14

Why would decreasing distance speed up the rate of diffusion?

The lower the distance, the less the particles have to travel, saving time