What affects the rate of diffusion through a selectively permeable membrane?
I.concentration gradient
II.temperature
III.molecular size
A) I only
B) II only
C) I and II
D) II and III
E) I, II, and III

Question

What affects the rate of diffusion through a selectively permeable membrane?
I.concentration gradient
II.temperature
III.molecular size
A) ​I only
B) ​II only
C) ​I and II
D) ​II and III
E) I, II, and III​

Quizplus · Accepted Answer

The rate of diffusion through selectively permeable membrane is affected by three main factors - concentration gradient, temperature, and molecular size. The concentration gradient is the difference in concentration of solutes between two solutions separated by a membrane, and it plays a crucial role in driving the diffusion of solutes from high to low concentration. The higher the concentration gradient, the faster the rate of diffusion.

Temperature also affects the rate of diffusion, as higher temperatures increase the kinetic energy of molecules, leading to faster diffusion. Conversely, lower temperatures decrease the kinetic energy of molecules and slow down diffusion.

Molecular size is the third factor that affects the rate of diffusion. As a general rule, smaller molecules will diffuse faster than larger molecules, as they can pass through the openings in the membrane more easily. Therefore, all three factors - concentration gradient, temperature, and molecular size, must be considered to understand the rate of diffusion through a selectively permeable membrane.

What Affects the Rate of Diffusion Through a Selectively Permeable