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Constriction is a method used by various snake species to kill their prey. Although some species of venomous and mildly-venomous snakes do use constriction to subdue their prey, most snakes which use constriction lack venom. The snake initially strikes at its prey and holds on, pulling the prey into its coils or, in the case of very large prey, pulling itself onto the prey. The snake will then wrap one or two coils around the prey. A Carpet snake (Morelia spilota variegata) eating a chicken.Contrary to myth, the snake does not crush the prey, or even break its bones. Traditionally, it has been thought that snakes hold tightly enough to prevent the prey from drawing air into its lungs, resulting in death from asphyxia. However, some prey items seem to die faster than would be possible through asphyxia, so it has also been suggested that the pressure of constriction causes a rise in the pressure in the prey's body cavity greater than the heart can counter, resulting in immediate cardiac arrest. This new hypothesis has yet to be confirmed, but data indicates that snakes can exert enough pressure for this mechanism to be plausible. Research into this topic is ongoing. It has been revealed that the green anaconda (Eunectes murinus) has a constriction strength of 6 kg/cm, which effectively means a total strength of 4000 kg . Certain groups of snakes have characteristic patterns of constriction, including the number of coils they use and the orientation of the coils. From Wikipedia under the
GNU Free Documentation License  jimmunol.org Cicin-Sain, L., Smyk-Paerson, S., Currier, N., Byrd, L., Koudelka, C., Robinson, T., Swarbrick, G., Tackitt, S., Legasse, A., Fischer, M., Nikolich-Zugich, D., Park, B., Hobbs, T., Doane, CJ, Mori, M., Axthelm, MT, Lewinsohn, DA, Nikolich-Zugich, J. hu, 03 Jun 2010 20:04:33 GM Therefore, it remains unclear whether and to what extent the loss of naive T cells, their partial replacement by oligoclonal memory populations, and the consequent . constriction. of TCR repertoire limit the Ag responses in aging primates. ...  ultravioletledflashlight.isay.co.za semtino Sat, 10 Jul 2010 18:26:15 GM Constriction. : .703. These chokes are extended, knurled and have a black oxide finish. They are specifically designed for use with steel and other environmentally friendly shot. This is the ultimate choke for long range pass shooting of ...  isteroids.com i steroids Fri, 28 May 2010 01:39:21 GM According to a new bench research from the Mayo Clinic, female sex hormones can work with beta-agonists to reduce airway . constriction. . The findings are being presented at the ATS 2010 International Conference in New Orleans. ... From Google Blog Search: "constriction" What are these words Constriction & Constellation and to whom are they usefull to ? Q. What are these words Constriction & Constellation and to whom are they usefull to ? Asked by Speaking A - Mon Dec 29 06:43:52 2008 - - 1 Answers - 0 Comments A. Constriction is a method used by various snake species to kill their prey. Although some species of venomous and mildly-venomous snakes do use constriction to subdue their prey, most snakes which use constriction lack venom. The snake initially strikes at its prey and holds on, pulling the prey into its coils or, in the case of very large prey, pulling itself onto the prey. The snake will then wrap one or two coils around the prey. Constriction, the opposite of dilation or dilatation, also refers to vasoconstriction, the narrowing of blood vessels caused by vascular smooth muscle contractions. Constriction can also refer to the act of binding a victim with rope. whereas a constellation is a group of stars that appear to have a physical… [cont.] Answered by Akanksha - Mon Dec 29 06:54:03 2008 what causes pupil constriction in pontine lesions? Q. what causes pupil constriction in pontine lesions? Asked by monivros - Sat Jun 7 19:44:20 2008 - - 2 Answers - 0 Comments A. According to one source, a possible hemorrhage or stroke in the pons. Answered by MaviGozler - Sat Jun 7 19:53:26 2008 determine the pressure drop in the constriction.?
Q. While a person inhales, air moves down the bronchus with a speed of 15 cm/s. The average flow speed of the air doubles through a constriction in the bronchus. Assuming incompressible flow, determine the pressure drop in the constriction. Show the computations clearly Asked by macedon - Sun Mar 16 22:29:29 2008 - - 1 Answers - 0 Comments A. -0.0405 Pa. The Bernoulli equation provides the solution (ref. 1). It's based on the conservation of energy. The equation for energy per unit volume is E/V = P + v^2/2 + gh, where P is pressure, is density and v is flow velocity. Conservation says P1 + v1^2/2 + gh1 = P2 + v1^2/2 + gh2 We can neglect the third term on each side because the height change * density is negligible. So we have, after simplifying, P2 - P1 = (v1^2 - v2^2)/2 = -0.0405 Pa, using v1 = 0.15 m/s, v2 = 0.3 m/s, and assuming (air) = 1.2 kg/m^3. Ref. 2 lists this value as the approximate density of dry air at 70 F, and contains information for calculating density for moist, warmer air such as would be found in the bronchia. The net result of the constriction is… [cont.] Answered by kirchwey - Wed Mar 19 19:26:13 2008 From Yahoo Answer Search: "constriction" |
