Goldfish Lab

Potential error could result in when quantitatively transferring in any step and spillinng or not transferring all of any given solution. When diluting each flask has a different level for where its specific volume is, so overfilling the flask is possible when not being focused on. The condition of each penny can impact the results by if some copper was chipped off, or if anything attached to the pennies could impact test results. All of these could result in a different than desired copper percentage. It is important that the absorbance of each penny be within the range of absorbance the calibration curve has. This is because the curve created for this lab was made with 0.00 – 10.00mL of Cu^(2+)stock solution when using those values idealy this curve should therefore be 0-100% copper percentage. If values were found outside of this calibration curve then there would be problems with either calculations or a different curve would be needed to properly record

Temperature and environment plays a key role on the effects of an ectothermic organism’s metabolism. The specific ectothermic organism used in this study was the Gromphadorhina portentosa also known as the Madagascar Hissing Cockroach. In this study we measured CO2 production (%) and temperature (̊C) every three minutes for a total of 15 minutes in three different temperature environments. The three temperature environments conducted in the experiment included room temperature, a cold environment (ice bath), and a hot environment (how water bath). The purpose of this study was to test the effects of temperature change on

Homeostasis is the maintenance of the internal environment despite changes in the external environment. One of these environmental conditions is temperature. Fish are ectotherms, or conformers, which means they can not maintain a constant body temperature. They change their body temperature, by moving from colder to

Ectothermic animals are animals whose body temperature is affected by their surroundings. This means that if the environment is cold the animal will be cold. If the environment is warm the animal will be warm. This is because the animal doesn’t have the capability of regulating its body systems to keep a constant body temperature. When an ectothermic animal is cold, its heart rate will lower. When the animal is warmer, the heart rate will raise – as long as the temperature isn’t sufficiently high to harm the animal. (Campbell, 2005)

Freeman (2008) furthers Eckert et al’s argument by stating that the actin filaments of the muscle cell in organisms are able to intake ATP (adenosine triphosphate) faster and will move the organism faster when higher temperatures are imposed. This is because of an increase in enzyme reaction rates (Freeman 2008). These arguments can be applied to our experiment to help explain the trends observed. It can be argued that as the Gammarus setosus experiences the cold treatments, the organ of Bellonci senses the cold temperature, which in turn signals the organism to preserve its energy to protect itself; therefore, the organism will swim slower. In addition, the enzymes in the muscle cells of the organism, when experiencing the cold treatments, will have decreased ability to carry out enzymatic reactions, therefore inhibiting the uptake of ATP, which will cause the organism to swim slowly. Conversely, as the organisms are put into the heated treatments, the organ of Bellonci senses the heat, and allows the organism to swim faster, since it does not have allocate as much of its energy towards survival. Furthermore, the enzymes in the cells will be able to catalyze reactions more quickly, therefore allowing the organism to swim faster. However, when the temperature of the surroundings is too high, the enzymes will denature, therefore, reducing the activity rate of

direct calorimetry. Furthermore, the amount of oxygen in the chamber reveals the amount of cellular respiration of the organism. While also, test the effects of decreasing oxygen, and later increasing the heat on the metabolic rate of goldfish. I hypothesize that an increase in temperature will increase their metabolic rate

Cutting through the mink to study its anatomy helps the group to realize that they are similar to human. The most important tools used in the lab are scissor, probe, pins, tweezer, and scapula. The most tool being used is scapula which is used to cut up the mink and skin it. Safety materials are required in the lab in order to avoid accident. Since the minks contain cancerous chemicals on them, the classes are required to wear safety goggles, apron, and gloves. The class started the dissection from May 18th to May 27th in third period of Anatomy class.

The Purpose of this experiment was to determine the importance of cellular respiration in the processes of Life. The objective of this experiment was to determine the rate of cellular respiration and how the presence of carbohydrates and pollutants will affect it. Our hypothesis was that an organism has larger rate of Cellular Respiration with the source of Carbohydrates as compared to the one that is without the Carbohydrates source and vice versa in

Therefore this experiment was to determine that lobsters in various salinities will osmoconform to their environment. In order to test that lobster's osmoconform, we had to extract approximately 1.0 ml hemolymph from their hemocyannin on the ventral first section of the pre-branchial region. The hemolymph was spun for three minutes in a microcentrifuge and the serum was then tested on an osmometer, which determined the osmolarity of the hemolymph. The results substantiated the hypothesis, in that, lobsters internal osmoles fluctuate with the salinity of the external environment. The two lobsters in the low salinity tank had the lowest osmolarity 0.746 osmoles; the two lobsters in the normal salinity had 0.873 osmoles. The last tank with the highest salinity had the lobsters with the highest osmolarity at 1.445 osmoles. Therefore our data suggests that lobster's osmoconform, with respect to the salinity of their environment by readjusting their intracellular solute concentration to prevent swelling or dehydration because the osmolarity of their hemolymph dictates that of the environment.

In this lab, we are going to try to answer the question, Does body size affect endotherms metabolic rates? This question is very controversial among scientists. They’ve only agreed on one thing, there are different scalings between animals, but they don 't know how that affects metabolism and why (Hoppler and Weibel 2005). Some scientist’s studies show that body size in endotherms does affect metabolism rate due to SA/V ratios. The ratios affect the endotherms metabolism based on how high or low the SA/V ratio is. An animal with a larger SA/V ratio puts off more heat to their environment. This results in smaller animals having to burn through their food more to maintain their body temperature (“Unit 4 Demos More on Metabolic Rate”). What led us to the formation of our experiment was the experiment performed in the article Smith et al. (2015). In

Somewhat more precise descriptions can be made by using the terms poikilothermic and homoiothermic. The body temperature of poikllotherms is relatively variable, while that of homeotherms is relatively constant.

In the human body the internal temperature is maintained at 37 degrees Celsius and this is maintained as a result of homeostasis. Homeostasis is the process of balancing or keeping a stable internal environment in the body. A majority of organ systems in the body contribute to homeostasis, however there are two very important organ systems that play a massive role within this process, and they are the endocrine and nervous system. Both are crucial as they permit communication in the body and the integration of cells as well as tissue functions.

The example given is the coral trout, a fish that is commercially important. Since the water temperature has risen higher up in the water, these trout tend to be more lethargic now; they stay lower in the water. This is crucial because all of their hunting and mating ground is higher

The Carassius auratus (goldfish) is an ectotherm and its physiologic functions are influenced by the shifts in their external temperature. In this experiment, we hypothesized the ventilation and oxygen consumption of the goldfish in a warm environment will have higher rates than goldfish in a cold environment. Based on the results, there was a statistical significance with a >99.5% confidence level in the ventilation rate of each treatment. According to a previous study by Szekeres et al. (2014), goldfish exposed to cold temperatures express a significantly lower ventilation rate than the goldfish in a control environment. However, there was not a statistical significance in the oxygen consumption rates of each treatment due to a <90% confidence

Two crab species, Plagusia and Cyclograpsus, were collected from a local estuary in the littoral and deep water zone for osmoregulation studies. To examine differences in osmoregulatory mechanisms among the species, haemolymph of the specimens was extracted once they were acclimated to varying concentrations of seawater. Using the comparative melting-point, capillary tubes were filled with small samples of seawater and blood then frozen and melted in a -15˚C ethanol bath. The melting time of each was observed thereafter. Subject’s time range fell over 17 minutes of which the majority of the most salinated samples melted