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A good example of polar molecules can be understood when trying to make a cake. If water and oil are required, they will not mix together. If you put them into a measuring cup, the oil will rise to the top while the water remains on the bottom.
Atropine, along with scopolamine and hyoscyamine, is found in the Datura stramonium plant, which gives hallucinogenic effects and is also known as locoweed.
According to the FDA, adverse drug events harmed or killed approximately 1,200,000 people in the United States in the year 2015.
When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
Oliver Wendell Holmes is credited with introducing the words "anesthesia" and "anesthetic" into the English language in 1846.