Biology Chapter on Diffusion

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Questions and Answers

What is the main driving force behind diffusion?

  • Energy input from cellular processes
  • Active transport mechanisms
  • Movement from low concentration to high concentration
  • Movement from high concentration to low concentration (correct)

Which of the following is NOT a factor affecting diffusion?

  • Temperature
  • Concentration gradient
  • Molecular polarity (correct)
  • Size of molecules

What characterizes the process of diffusion?

  • It is a passive process (correct)
  • It requires specific protein channels
  • It involves molecules moving against the concentration gradient
  • It requires energy to proceed

In which scenario would diffusion occur most rapidly?

<p>At a high temperature with a steep concentration gradient (A)</p> Signup and view all the answers

What example illustrates the concept of diffusion?

<p>Oxygen entering cells and carbon dioxide exiting (A)</p> Signup and view all the answers

Flashcards

Diffusion

Movement of molecules from an area of higher concentration to an area of lower concentration until they are evenly distributed.

Concentration Gradient

The difference in concentration between two areas.

Temperature and Diffusion

Diffusion happens faster at higher temperatures.

Size and Diffusion

Smaller molecules diffuse faster than larger molecules.

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Passive Diffusion

Diffusion is a passive process, meaning it doesn't require energy.

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