Category: Ra-Re

Bulging of the front wall of the rectum into the vagina. Rectocele is due to weakening of the pelvic support structures and thinning of the rectovaginal septum (the tissues separating the rectum from the vagina). Also called a proctocele. Risk factors for a rectocele include a history of multiple, difficult or prolonged deliveries, forceps or other assisted methods of delivery, perineal tears, an episiotomy into…

Blood passed rectally. Blood in the stool can be bright red or maroon in color. Larger amounts of blood that remain in the intestine long enough can turn the stool black. Blood in the stool also may be invisible to the naked eye (occult). The causes of blood in the stool range from harmless, annoying conditions of…

Having to do with the rectum, the last 6 to 8 inches of the large intestine that serves to store solid waste until it leaves the body through the anus. The word “rectal” comes from the Latin “rectus” meaning “straight” (which the human rectum is not).

The RDA, the estimated amount of a nutrient (or calories) per day considered necessary for the maintenance of good health by the Food and Nutrition Board of the National Research Council/ National Academy of Sciences. The RDA is updated periodically to reflect new knowledge. It is popularly called the Recommended Daily Allowance.

Popular name for the Recommended Dietary Allowance (RDA).

A series of procedures that are used to join together (recombine) DNA segments. A recombinant DNA molecule is constructed from segments of two or more different DNA molecules. Under certain conditions, a recombinant DNA molecule can enter a cell and replicate there, either on its own or after it has been integrated into a chromosome.

A person with a new combination of genes, a combination not present in either parent, due to parental recombination of those genes.

Recession of medial rectus muscle is a type of surgery used to correct certain types of strabismus, or a condition in which the eyes do not properly align with each other. This surgery changes the length or position of the medial rectus muscle, which is one of the muscles that control the side-to-side movement of the eyes.

1. In cell biology, a structure on the surface of a cell (or inside a cell) that selectively receives and binds a specific substance. There are many receptors. There is a receptor for (insulin; there is a receptor for low-density lipoproteins (LDL); etc. To take an example, the receptor for substance P, a molecule that acts…

Short-term memory. Also called working memory. Recent memory is a system for temporarily storing and managing the information required to carry out complex cognitive tasks such as learning, reasoning, and comprehension. Recent memory is involved in the selection, initiation, and termination of information-processing functions such as encoding, storing, and retrieving data. One test of recent memory is memory span,…