Which one of the following is an example of simple diffusionSelect one:a. Glucose transport from intestinal cells to the bloodb. Amino acid transport from intestinal lumen into the cellsc. Glucose transport from intestinal lumen into the cellsd. Sodium influx via voltage gated sodium channel
Question
Which one of the following is an example of simple diffusionSelect one:a. Glucose transport from intestinal cells to the bloodb. Amino acid transport from intestinal lumen into the cellsc. Glucose transport from intestinal lumen into the cellsd. Sodium influx via voltage gated sodium channel
Solution
The correct answer is d. Sodium influx via voltage gated sodium channels.
Simple diffusion is a passive process that allows small, nonpolar substances to move across the cell membrane without the need for transport proteins. In this case, sodium ions move through voltage-gated sodium channels, which is a form of simple diffusion.
The other options involve the transport of larger, polar molecules like glucose and amino acids, which require transport proteins to move across the cell membrane, a process known as facilitated diffusion.
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