Regulation of Blood Pressure in the Land Crab Cardisoma guanhumi
7th Dec 2005, 02:04 GMT
We examined the cardiovascular responses to acute and chronic changes in blood volume (BV) in the land crab Cardisoma guanhumi. Acute reduction in BV caused an increase in activity in the dorsoventral muscles (DVMs) and to a lesser extent in the epimeral attractor muscles (EAMs). Contraction of the DVMs and EAMs will decrease the volume of the dorsal sinus and the thorax as a whole, respectively. BV reduction also caused bradycardia with frequent periods of cardiac arrest. There was a small drop in hemolymph pressure. BV expansion had the reciprocal effect on DVM and EAM activity but had no effect on heart rate (f H). After the cardioregulatory nerves were cut, acute hypovolemia had no effect on f H but still caused a moderate increase in DVM activity. After dehydration-induced BV reduction, DVM activity increased, whereas hemolymph pressure, f H, and EAM activity were maintained close to control levels.
Regulation of Blood Pressure in the Land Crab Cardisoma guanhumi related news:
- Higher blood pressure means lower brain health — U.S. News & World Report
- Heat may hit those with high blood pressure — KeralaNext: Health
- Uncontrolled high blood pressure means more cognitive problems in old age — EurekAlert! - Medicine and Health
- Uncontrolled blood pressure is a ''silent killer'' — The Earth Times Online Newspaper
- Obesity, Blood Pressure Woes Haunt Aging Boomers (HealthDay) — Yahoo! News: Health News
- Pair fresh crab with refreshing riesling — The Seattle Times: Seattle Storm
- Cord Blood Registry Opens World's Largest Newborn Stem Cell Facility — Government/ Industry Regulation News from StratCenter.com
- Most Detailed Image Of The Crab Nebula — ScienceDaily Headlines
- Congress hears appeals for more research on two health problems — WOODTV - Political News
- Google Approves Blood Pressure Tracker Plug-in for Sidebar — PR Web (The Free Wire Service) Consumer Web sites / Internet
Latest news from Physiol Biochem Zool Latest Articles:
- Baseline and Stress-Induced Plasma Corticosterone Concentrations of Mice Selectively Bred for High Voluntary Wheel Running
- The African Lungfish (Protopterus dolloi): Ionoregulation and Osmoregulation in a Fish out of Water
- The Recovery of Locomotory Activity following Exhaustive Exercise in Juvenile Rainbow Trout (Oncorhynchus mykiss)
- Low Cost of Locomotion in Lizards That Are Active at Low Temperatures