Diffusion and Cell Membrane Concepts

Diffusion and Cell Membrane Concepts

Assessment

Interactive Video

Biology, Science, Chemistry

6th - 8th Grade

Practice Problem

Hard

Created by

Patricia Brown

FREE Resource

This video tutorial explains diffusion, a process where particles move from high to low concentration until evenly distributed. It uses a beaker example to illustrate equilibrium and constant particle motion. The concept is applied to cells, highlighting the semi-permeable membrane's role in diffusion. The tutorial discusses concentration gradients and provides examples like oxygen and carbon dioxide diffusion in red blood cells. Diffusion is passive, requiring no energy, unlike active processes.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the basic principle of diffusion?

Particles move randomly without any pattern.

Particles remain stationary.

Particles move from low to high concentration.

Particles move from high to low concentration.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the beaker example, what is the state called when particles are evenly distributed?

Balance

Inertia

Equilibrium

Stasis

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What characteristic of the cell membrane allows certain particles to pass through?

Impermeability

Permeability

Non-permeability

Semi-permeability

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which factor does NOT affect a particle's ability to move across a cell membrane?

Size

Charge

Color

Lipid solubility

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is a concentration gradient?

A difference in particle color

A difference in concentrations across a space

A difference in particle charge

A difference in particle size

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How do oxygen and carbon dioxide move in and out of red blood cells?

By osmosis

By active transport

By facilitated diffusion

By diffusion

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the net movement of particles during diffusion?

From low to high concentration

From high to low concentration

No net movement

Random movement

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