As you might think, bacterial infections are caused by bacteria, and viral infections are caused by viruses. Perhaps the most important distinction between bacteria and viruses is that antibiotic drugs usually kill bacteria, but they aren't effective against viruses.s you might think, bacterial infections are caused by bacteria, and viral infections are caused by viruses. Perhaps the most important distinction between bacteria and viruses is that antibiotic drugs usually kill bacteria, but they aren't effective against viruses.
What is the bump in the cortex called? The bump in the cortex is called the gyrus. It is the convex fold in the surface of the brain and surrounded by one or more sulci.
The wrinkles of the brain increase the surface area of the brain. The involutions are called sulci or fissures, and the bumps in-between these involutions are called gyri.â¦ Most of your brain cells are within the gray matter of the brain & most of your gray matter is in the outer layer of the brain.Therefore, if you increase the surface area of your outer layer of the brain with sulci and gyri, it creates more cortex for our limited sized skulls.he cerebrum or the cortex is the largest part of the human brain,  associated with higher brain function such as thought and action.