Motility, when present, is conferred by flagella.
Gastrointestinal changes occur, including decreased secretion of stomach acid; decreased intestinal motility, resulting in constipation and dehydration of the stools; slower metabolism of drugs by the liver; increased incidence of gallstones; and loss of teeth, impairing proper chewing and digestion.
Obstruction or decreased bowel motility also can occur with constipation and fecal impaction.
Only the ciliates among the three major motility groups of protozoans, however, represent a truly monophyletic group (or single evolutionary line).
Defects in transport occur either because the absorptive cells of the intestine lack certain enzymes, whether by congenital defect or by acquired disease, or because the cells are hindered in their work by other disease processes that infiltrate the tissues, disturb motility, permit bacteria to overpopulate the bowel, or block the pathways over which transport normally proceeds.
Semen analysis, laboratory examination of a sample of seminal fluid, usually consisting of the determination of semen volume, alkalinity or acidity (pH), sperm number (or sperm count), and the motility, shape, and viability of sperm.
Possible causes of infertility are a low sperm count, low motility, or a low percentage of normal forms.
A characteristic of small intestine motility is the inherent ability of the smooth muscle constituting the wall of the intestine to contract spontaneously and rhythmically.
This has been described as the "gradient" of small intestine motility.
As they leave the body, the sperm receive oxygen, which is vital to motility.
(See metabolism.) Energy made available to cells in the form of ATP is used in a variety of ways for example, for motility.
