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Spiders

This report deals with testing the toxicity of certain chemicals on spiders,

and determining the toxicity by how it affects it's ability to weave it's web. This report contains research on the four chemicals (benzedrine, chloral hydrate, caffeine, and alcohol) as wellas the spiders and their webs.

Spiders are of course found in the class Arachnidia, which also contain mites, scorpions, and other arthropods. The order which spiders are classified under is called Araneae, a word of Latin origin. Most spiders are land dwelling, but some can be aquatic. Those that are aquatic spend most of their lives in or around water. Spiders can live in a vast amount of different places around the world. Jumping spiders have been collected on Mt. Everest at a height of 22,000 feet, the highest elevation at which any animal has been collected (Orkin, Insect Zoo 1).

Adult species vary greatly in size, which is a contributing factor in the prey they choose, and also the way they catch this prey. Spiders range from less than three hundredths of an inch to more than 10 inches. All spiders are carnivorous in their eating habits, insects being first on their menu. Spiders usually catch live animals because the movement of the p


rey attracts its attention. Some spiders have poor vision, and rather depend on the movement of it's web to locate an insect. (Orkin, Insect Zoo 2). The prey is usually wrapped in silk before the spider injects the venom to kill it. Yet the larger the spiders, the larger its prey. Some spiders have been known to kill vertebrate animals, such as fishing spiders, who thrive on small fish, or bird spiders, feeding on small birds from South America, as well as a variety of lizards. Some species have even been known to attack snakes. When food is scarce, mainly during winter months,

DEA. Drugs of Abuse [Online] Available http://mir.drugtext.org/druglibrary/schaffer/dea/pubs/abuse/chap3/depress/chloral.htm, Nov. 7, 1999

Though these statistics are for humans only, they strongly correlate to other animals as well, because their toxicity does not change based on who the recipient is. Unless spiders have an unprecedented immune system to certain chemicals, the results should be on the same scale as the human's effects.

The frontal lobe, which controls judgment and reasoning, the midbrain, which regulates muscle control and coordinates movement, and the hindbrain, which controls bodily functions such as respiratory rate and heart rate, can all be affected. Death can result from a BAC (blood alcohol content) of 0.5 or higher. (Schroeder, Alcohol Awareness 23)



Some common words found in the essay are:
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Approximate Word count = 1352
Approximate Pages = 5 (250 words per page double spaced)


  

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