When blood vessels get smaller in diameter it is know as what?

What is the condition of the kidney caused by pressure from urine that cannot flow past an obstruction in the urinary tract is called? Do elderly people have older blood? Does a liver cleanse product make you pee more? When does your voice change when you are an average boy? What do we call the part of your immune system that actively targets germs in your body for destruction? How do you react when someone as died? What are the effert of heat sensation in lower abdomen? Can you have a phobia of the fear of white trucks? What are the effects of transsexualism? Does meningitis need oxygen? Is Diphtheria the same as the Whooping Cough? How may insomnia be prevented? How can you fight disease and stay healthy? How soon can you know if you're pregnant? What if your blood pressure is about 150 over 93 and having bad headaches is that normal? How does your hair grow? Red blotchy rash mainly on lower part of both legs There is a mild rash on your arms but do not itch as bad as the legs The rash is very bad from the knees to the ankles Please help you? Can anyone be allergic to honey? What happens in an acid reflux treatment? Why did environmentalism develop?