Question

Which of the following is NOT true of diffusion in the human body?

A. Diffusion occurs faster at higher temperatures.
B. Diffusion is rapid over short distances and slower over longer distances.
C. Net movement of molecules occurs until the osmolarity is equal.
D. Smaller molecules take longer to diffuse than larger ones.

Answer 1

Diffusion in the human body occurs faster at higher temperatures, is rapid over short distances and slower over longer distances, and smaller molecules diffuse faster than larger ones.

Step-by-step explanation:

Diffusion in the human body follows certain principles. Firstly, diffusion occurs faster at higher temperatures. Secondly, diffusion is rapid over short distances and slower over longer distances. Thirdly, the net movement of molecules occurs until the osmolarity is equal. And finally, smaller molecules actually diffuse faster than larger ones.The diffusion process is crucial for the movement of gases and small uncharged molecules into and out of cells without requiring energy. For instance, the passive diffusion of gases like O2 and CO2 across cellular membranes is vital for physiological respiration in the lungs and cellular respiration in mitochondria.