Science Report

ABSTRACT In this study, we investigated the relationship of chemical stressors, that are a arousal and a depressant on the nervous im nonplus counts of a Lumbriculus variegates sucking louse, which was used during the lab. The wriggles were exposed to chemical stressors as mentioned before, which were a stimulative and a depressant, to determine the publication on its jiffy send. The results that were obtained in the lab showed that caffeine, which was a stimulant, realized an increase in the pulse rate of the Lumbriculus variegates worm, scarce ethanol didnt induce an increase in the pulse rate of the Lumbriculus variegates worm. The worm was lay on a slide under the microscope, for it to be discover at 4x objective. INTRODUCTION Lumbriculus variegatus is a freshwater oligochaete worm that tolerate be found in North the States in shoal habitats at the edge of ponds, lakes, and marshes. Not only when is it found there, but also in the sed iments as well. The worm has a dilute outer body contend and is commensurate to breathe by diffusion of gases across the body wall near the tail. It can produce asexually, or sexually. It has a closed circulatory system, which contains brawny blood vessels pumping fluid through the system. In this study, the main subject that it is going to be determined is whether a stimulant (caffeine) or a depressant (ethanol) will chance upon the pulse rate of the worm. The stimulant would have more effect on the pulse rate of the worm, because the effect would occur straightaway than the depressant. MATERIALS AND METHODS 1) Organism Lumbriculus variegates was a worm that was used in this experiment, as it was observed under a microscope using the 4x objective. 2) Chemical ethyl alcohol was used in this experiment as a resolve that was added to the worm so that the effect on its pulse rate would be established. The chemicals were prepa red that stimulates either harmonic or para! sympathetic nervous systems. 3) Test set-up A trough slide...If you want to stick out a full essay, order it on our website: BestEssayCheap.com

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