How Does Parathyroid Hormone Increase Blood Calcium? Like all endocrine glands, parathyroids make a hormone (a small protein capable of causing distant cells in the body to react in a specific manner). Parathyroid hormone (PTH) has a very powerful influence on the cells of the bones which causes them to release their calcium into the bloodstream. Calcium is the main structural component of bones which give them their rigidity--but remember from our first page, the principle purpose of the bones is to provide a storage system for calcium--so our brain will never be without calcium.
Updated August 10, 2016. An allusion is a reference, within a literary work, to another work of fiction, a film, a piece of art, or even a real event. An allusion serves as a kind of shorthand, drawing on this outside work to provide greater context or meaning to the situation being written about.
Define Allusion: The definition of allusion is quite simple: it is the reference in one work to another important work, person, event, etc. Like other literary devices, it is the readerâs responsibility to recognize and understand allusions, and many of the most famous allusion examples in literature refer to Greek or Biblical stories. A writer incorporates allusions to impact overall purpose. Similarly, allusions should be used wisely and sparingly. For allusion examples, see above.