专业术语—口腔生理学术语R1(英文详解)

（单词翻译:单击）

    Rest Position - a position the jaw¹ adopts when at rest with the lips lightly together.

    Reticular fibres - are fine type III collagen fibres forming a net-like supporting framework or reticulum. They are found around small blood vessels², nerve cells, muscle fibres and in particular beneath epithelial membranes³ as part of thebasal lamina.

    Reticular formation - in the central core of the medulla, it consists of several structures, including the periaquaductal grey. The reticular formation integrates information from many sources and influences sensory⁴ motor and autonomic activity. It is involved in aversive drive (behaviour which is an instinctive⁵ turning away from the unpleasant).

    Retinoic acid - a product of retinol(Vitamin A) which binds⁶ onto cell membranes and controls cell division and differentiation⁷ through gene⁸ expression.

    Ribosomes - - structures in the cy lasm of cells which attach onto messenger RNA. At the ribosome, the code of nucleotides on the mRNA is translated into a series of aminoacids.

    RNA - Ribosenucleic acid - seenucleic acids.

    Root resorption - resorption of cementum and underlying⁹ root dentine by osteoclasts. Temporary zones of root resorption may occur during orthodontic tooth repositioning. More extensive and irreversible root resorption may occur if the root becomes ankylosed.

    Rugae - raised ridges¹⁰ of epithelium, each with its core of lamina propria, found on the anterior¹¹ wall of the hard palate.