Science Report

ABSTRACT In this study, we investigated the relationship of chemical stressors, that are a arousal and a depressant on the nervous im quake counts of a Lumbriculus variegates dirt ball, which was used during the lab. The worms were exposed to chemical stressors as mentioned before, which were a stimulative and a depressant, to determine the exercise on its thump tell. The results that were obtained in the lab showed that caffeine, which was a stimulant, graveld 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 set on a slide under the microscope, for it to be detect 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 totally is it found there, but also in the sediments as well. T he worm has a dilute outer body rampart and is equal to(p) to breathe by diffusion of gases across the body wall near the tail. It can produce asexually, or sexually. It has a disagreeable 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 motivate the pulse rate of the worm.

The stimulant would have more effect on the pulse rate of the worm, because the effect would occur sudden 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 grain alcohol was used in this experiment as a firmness of purpose that was added to the worm so that the effect on its pulse rate would be established. The chemicals were prepared that stimulates either harmonic or parasympathetic nervous systems. 3) Test set-up A trough slide...If you want to take hold of a full essay, order it on our website: BestEssayCheap.com

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