Your heart has four valves. normally, these valves open to let blood flow through your heart, and then shut to keep it from flowing backward. sometimes the valves don't work properly, causing some or all of the following disorders. in regurgitation, blood leaks back through the valve in the wrong direction. in valve prolapse, the valves have "floppy" flaps and don't close tightly. it's one of the most common heart valve conditions. sometimes it causes regurgitation. in stenosis, the valve doesn't open enough and blocks blood flow. based on your knowledge of the heart, explain how regurgitation, valve prolapse, and stenosis each adversely affects blood flow and the oxygenation of body tissues.

Name the non metal condut electricity

To understand the behavior of the electric field at the surface of a conductor, and its relationship to surface charge on the conductor. a conductor is placed in an external electrostatic field. the external field is uniform before the conductor is placed within it. the conductor is completely isolated from any source of current or charge. part a: which of the following describes the electric field inside this conductor? it is in the same direction as the original external field.it is in the opposite direction from that of the original external field.it has a direction determined entirely by the charge on its surface.it is always zero. part b: the charge density inside the conductor is: 0non-zero; but uniformnon-zero; non-uniforminfinite part c: assume that at some point just outside the surface of the conductor, the electric field has magnitude e and is directed toward the surface of the conductor. what is the charge density η on the surface of the conductor at that point? express your answer in terms of e and ϵ0

Aviolently rotating column of air is formed around a region of extremely low air pressure above land. which of these weather conditions is most likely to follow? blizzard cyclone tornado hurricane