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.
Allusion. Allusion is a figure of speech, in which one refers covertly or indirectly to an object or circumstance from an external context. allusion n: passing reference or indirect mention. Allusion \Al*lusion\, n. [L. allusio, fr. alludere to allude: cf. F. allusion.] 1.A figurative or symbolical reference.llusion is a figure of speech, in which one refers covertly or indirectly to an object or circumstance from an external context. allusion n: passing reference or indirect mention. Allusion \Al*lusion\, n. [L. allusio, fr. alludere to allude: cf. F. allusion.] 1. A figurative or symbolical reference.