snare drum definition. A shallow cylindrical drum, with wires or pieces of catgut (snares) stretched across the bottom skin to give a sharp, rattling sound when the top skin is struck. Snare drums are used in orchestras and in nearly all kinds of bands. Discover our greatest slideshows.
Although some mucins are membrane-bound due to the presence of a hydrophobic membrane-spanning domain that favors retention in the plasma membrane, most mucins are secreted onto mucosal surfaces or secreted to become a component of saliva.ature mucins are composed of two distinct regions: 1  The amino-and carboxy-terminal regions are very lightly glycosylated, but rich in cysteines. 2  A large central region formed of multiple tandem repeats of 10 to 80 residue sequences in which up to half of the amino acids are serine or threonine.
The mouth is moisturized and lubricated mainly by the secretions of the major salivary glands although the minor salivary glands and mucus producing cells in the lining of the inside of the mouth also contribute towards it. Saliva is a combination of a mucus and serous secretion.xcessive mucus in the nasal cavity including from the paranasal sinuses may drain into the mouth. It is part of the airway but discussed separately since it is one of the main causes of excessive mucus in the mouth. This includes 1  : Rhinitis (inflammation of the nose) : â 2  Infections, particularly viral and bacterial.