Okay. So this example reads, given that white matter contains more myelinated axons than gray matter, which of these statements about white matter is true? So let's just kind of think back to what we know about myelinated axons from our last chapter. We know that axons are where action potentials happen, right, where they get propagated along and we know that myelin makes those action potentials go really fast. Right? That's where we have our saltatory conduction, that really rapid signal conduction. So, looking at the answer choices here, I see that option A states that white matter is optimized for transferring signals rapidly throughout the CNS, and that is absolutely true, so our answer is A. Let's just breeze through B, C, and D to make sure we understand why those are incorrect.
Option B talks about white matter being optimized for processing visual and auditory signals. White matter certainly plays a role, but it's not necessarily optimized for the processing part of that. It's going to help relay the signals. And then option C states that white matter is responsible for decision-making processes in the brain, but it's not responsible for that. Again, it's going to be helping but decision making is a super complex process that involves lots of areas of gray matter and white matter working together. The same is for D. Option D states that it's responsible for storing information in the brain. Again, it definitely plays a part but it is not solely responsible for that. That's a whole bunch of networks of gray matter and white matter working together there. So our answer here is A, white matter is optimized for transferring signals rapidly throughout the CNS thanks to that saltatory conduction. Right? So, I will see you guys in our next one. Bye-bye.