The body has mechanisms to alter or maintain blood pressure and blood flow. There are sensors that sense blood pressure in the walls of the arteries... My WebMD Sign In, Sign Up
Perhaps while we're not watching, the denizens of Dark Shadows carry-on, caught in another inter-dimensional wing of Collinwood. If you peer out the corner of your eye, you may catch a glimmer of this shadowy activity, perhaps in Dark Shadows Collection 14, or Dark Shadows Collection 22.
The eye shadows are $7, but there is a lot of makeup in each one. Same with their lipglosses and pencils, etc. Usually you can find some Ulta stuff in clearance, too. But if you're talking about the other brands they sell...half and half. Maybelline, CoverGirl, etc. isn't any more or less pricey than your drugstore.