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Author Question: Technician A says that with self-adjusting clutch systems, the release bearing constantly rotates. ... (Read 2238 times) |
For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.
Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).
There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
The people with the highest levels of LDL are Mexican American males and non-Hispanic black females.
Asthma cases in Americans are about 75% higher today than they were in 1980.