Science Report

ABSTRACT In this study, we investigated the relationship of chemical stressors, that are a arousal and a depressant on the nervous im overreach counts of a Lumbriculus variegates convolute, which was used during the lab. The distorts were exposed to chemical stressors as mentioned before, which were a stimulative and a depressant, to determine the effect on its pulse wander rate. The results that were obtained in the lab showed that caffeine, which was a stimulant, vexd 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 determined on a slide under the microscope, for it to be observe 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 s ediments as well. The worm has a dilute outer body beleaguer and is adequate to(p) to breathe by diffusion of gases across the body wall near the tail. It can produce asexually, or sexually. It has a unopen 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 simulate the pulse rate of the worm.

The stimulant would have more effect on the pulse rate of the worm, because the effect would occur fleet than the depressant. MATERIALS AND METHODS 1) Organ ism Lumbriculus variegate! s was a worm that was used in this experiment, as it was observed under a microscope using the 4x objective. 2) Chemical fermentation alcohol was used in this experiment as a radical 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 protrude a full essay, order it on our website: BestEssayCheap.com

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