References in periodicals archive ?
When the baroreceptors sense low blood pressure, they generate signals that cause nerves of the autonomic nervous system to speed up heart rate and constrict blood vessels.
Because beta-blockers slow the pulse rate and constrict airways, they might cause complications in people with heart and lung problems.
With its prey still in its toothy grasp, the snake constricts, or coils around its meal.
A 12-volt electromagnet stationed on the outer surface of the flow channel acts as the valving mechanism; it constricts the flow of the fluid by magnetizing the iron particulates.
Epinephrine (also known as adrenaline) increases the heart rate, constricts blood vessels, and opens the airways--a reaction often called the "fight or flight" response.
Signed in 2002 by President Bush (who had promised to veto any measure of the sort that constricts freedom of speech), the law places severe restrictions on political speech--via advertisements and other public messages--that mentions political candidates within an election period.
Excessive pressure on the foot (especially the dorsum) constricts the nerves, arteries, veins, bones, tendons, and-joints of the foot.
It also constricts blood vessels near the skin's surface, resulting in early wrinkles.
After smoking, nicotine constricts blood vessels and impairs circulation to the body's extremities, as shown at far right.
The complaint alleges that an oversized, unlicensed newsstand at that corner constricts pedestrian traffic flow to such a degree that people are forced to walk in the street to make their way east or west along the south side of 34th Street.
This debilitating condition, called pulmonary hypertension, constricts lung arteries.