Practise MYP Biology questions on 1.3 Diffusion and review the explanations to check your understanding.
Use these questions for topic practice and to find ideas you want to revisit in your notes or lessons.
The __________ prevent backflow of blood from the ventricles into the atria. As a system approaches equilibrium, the rate of net diffusion __________ because the difference in concentration between two areas decreases.
Which of the following best explains why diffusion does not require an input of ATP from the cell?
Under which set of conditions would the rate of diffusion for a specific molecule be the highest?
Which statement best describes the movement of individual particles during the process of diffusion?
The time required for diffusion to move substances across a space increases __________ as the distance between the two areas increases.
increases
decreases
stops immediately
remains constant
Water molecules push the solute particles down the gradient
The movement is driven by the internal kinetic energy of the particles themselves
The cell membrane is porous and offers no resistance to particles
Gravity pulls the particles from high to low concentrations
High temperature and a steep concentration gradient
Low temperature and a shallow concentration gradient
High temperature and a shallow concentration gradient
Low temperature and a steep concentration gradient
They move randomly in all directions
They all move in a straight line toward the lower concentration
They stop moving once they are evenly distributed
They only move when the cell provides ATP
inversely
exponentially
proportionally
linearly
