wite a short note on types of poison snake
Answers
Explanation:
Snake venom is a highly modified saliva[1] containing zootoxins that facilitate the immobilization and digestion of prey, and defense against threats. It is injected by unique fangs during a bite, and some species are also able to spit their venom.
The glands that secrete the zootoxins are a modification of the parotid salivary glands found in other vertebrates, and are usually situated on each side of the head, below and behind the eye, and encapsulated in a muscular sheath. The glands have large alveoli in which the synthesized venom is stored before being conveyed by a duct to the base of channeled or tubular fangs through which it is ejected.[3][4]
Venoms contain more than 20 different compounds, mostly proteins and polypeptides.[3] A complex mixture of proteins, enzymes, and various other substances with toxic and lethal properties[2] serves to immobilize the prey animal,[5] enzymes play an important role in the digestion of prey,[4] and various other substances are responsible for important but non-lethal biological effects.[2] Some of the proteins in snake venom have very specific effects on various biological functions including blood coagulation, blood pressure regulation, and transmission of the nervous or muscular impulses, and have been developed for use as pharmacological or diagnostic tools, and even useful drugs.
Answer:
Explanation:
Snake species can be both venomous or non-venomous. Poisonous snakes produce venom as a defense mechanism and for immobilizing prey. Snake venom gets its toxicity from the presence of zootoxins, which are injected into the victim through fang bites or spitting. The venom-producing glands are situated on either side of the snake’s head and are protected by a muscular sheath. Proteins constitute the largest elements in snake venom and cause the most damage in prey by inhibiting important enzymes. The toxicity of a snake‘s venom is expressed by murine LD50 test (lethal dose 50%). This test requires the use of other animals, mostly mice, which are injected with a dose of a particular snake’s venom. The trial aims to find out which snake venom can kill half of the animal’s population. The snakes with the lowest values are the most venomous. Australia has the bulk of the world’s poisonous snakes, where they mostly inhabit the country’s coastal region
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