Calorie (with a lowercase “c”) is the energy needed to increase the temperature of water by one degree Celsius.
Calorie (uppercase “c”) is the equivalent to a kilocalorie (or 1000 calories)
Chemical change.
A chemical property describes the ability of a substance to undergo a specific chemical change. A chemical property of iron is that it is capable of combining with oxygen to form iron oxide, the chemical name of rust.
Element
An element is a pure substance that cannot be broken down into other substances, an element is made up of only one type of atom.
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Prostaglandin similarity with hormones is in the effect they achieve by binding to the receptors. Their effects are mediated by paracrine or autocrine mechanisms. Another hormone characteristic is the ability to stimulate adenylate cyclase activity, producing cAMP as the second messenger.
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On the other hand, prostaglandins differ from hormones in that they are not produced at a specific place but in many different places throughout the body. Also, the metabolic degradation of prostaglandins is very rapid.</span>
