You have two kidneys, each about the size of a fist, located on either side of the spine at the bottom of the rib cage. Each kidney contains about one million functioning units called nephrons. A nephron consists of a filtering unit of tiny blood vessels, called a glomerulus, which is attached to a tubule. When blood enters the glomerulus, it is filtered and the remaining fluid then passes through the tubule.
In the first case, each time the computer starts up, the question mark appears and flashes for a few seconds, then disappears. The cause of this symptom is that there is no hard drive selected in the Startup control panel. Remember that selected on the Macintosh means that an icon is darker than the other.
I asked this question earlier but the problem keeps reoccuring. Every morning my iMac is flashing a folder and question mark. I just push the button in the back to turn it off, turn it right back up and it runs perfect all day.But the next morning it will be on (rather then sleeping) and flashing this question mark and folder. just push the button in the back to turn it off, turn it right back up and it runs perfect all day. But the next morning it will be on (rather then sleeping) and flashing this question mark and folder.