Daphnia magna cannot function in extreme situations. When a ten percent solution was added the heart stopped. Adrenalin is a hormone secreted by the adrenal glands that helps the body deal with stress. This could show that the solution Daphnia was weak at the onset of the experiment.
Then one minute was given for the Daphnia magna to calm down. Record the number of heart beats in the data table on the next page. Daphnia magna is influenced by certain environmental conditions.
The heart rate was bpm at room temperature, then at 23 degrees, and then at 5 degrees. The hypothesis is that lowering the temperature of the surroundings of the ectothermic Daphnia magna will cause its heart rate to lower, and raising the temperature will increase heart rate.
If one would have added them back into the aquarium, the other daphnias would have gotten affected due to the other, added daphnias adrenalin. Trials 2 and 3 b. What was the dependent variable? Campbell, Daphnia was more tolerant to lower temperatures than to higher temperatures. If the data had supported the hypothesis the Daphnia would have had a higher heart rate at 45 degrees rather than dying.
LaFave, b The alcohol affected Daphnia as expected. Record your result in Table 1. It is a beating found almost midway in the back. It also shows that chemicals can be introduced if there is any reason to sedate or revive a creature.
At the beginning the heart rate was still quite high, probably due to the fact, that the daphnia was nervous and scared after being removed from its previous location. First, it could have been experimental error. While the nervous system works quickly and sends messages directly to specific body parts, the endocrine system takes a longer time to produce a longer-lasting effect.
Record this number in Table 1.
Adrenalin causes increases in metabolic rate, breathing rate, heart rate, blood pressure, sweating and even blood clotting. You want to make your measurements quickly, so that the Daphnia does not become stressed in the small volume of water.
Any excess petroleum jelly was wiped off so that there was only one layer on the well. Add two bristles or thread to the slide to limit the movement of the animal.
This would have contaminated all the other daphnias and make the further lab procedures impossible to complete. You will turn in a lab report that includes: Take at least three separate heart rate measurements for each individual Daphnia and calculate the average of the three measurements.
This experiment can be used to show the practical application of chemicals and temperatures in regulating body function. Why did you not return your daphnia to the original culture dish aquarium after the activity? When the temperature was considerably higher than room temperature the Daphnia could not handle the extreme, and it died.
A heart rate reading was taken for each temperature. This was at 0.The Effect of Temperature and Epinephrine on The Heart Rate of Daphnia Leslie Orzetti-Gollhofer Gaby Macias The Daphnia is a Crustacean other known as the water flea.
Lab Report Daphnia; Lab Report Daphnia.
Each slide was placed on a dissection microscope and the heart was located using the Helms manual and help from the lab instructor.
Then one minute was given for the Daphnia magna to calm down. The following was the procedure used by the temperature team. After the Daphnia was given time to.
The Effects of Temperature, Acetylcholine, and Adrenaline on the Heart Rate of Daphnia magna Hieu Duong 6 April Introduction The heart is a muscular organ that constantly pumps blood throughout the human body.
The continuous flow of blood creates a system for vital organs within the body to gain oxygen and nutrients. The timely %(4). Jackson Gillespie + Trinity Goderstad - Block 6 Biology Daphnia and Ethanol Lab Pre - Lab Ethanol, one of the purest forms of alcohol, causes difficulty walking, slurred speech, blurred vision, delayed reaction time, and slight to extreme memory impairment.
Daphnia Lab Report Essay The Effect of Temperature and Epinephrine on The Heart Rate of Daphnia Leslie Orzetti-Gollhofer Gaby Macias INTRODUCTION The Daphnia is a Crustacean other known as the water flea. 1.
General Biology II Lab Report II Title: The Effect of Temperature Change on the Heart Rate of Daphnia magna 2 Abstract The water flea Daphnia magna plays a central role in the aquatic food chain and serves as food for other freshwater organisms such as fish.5/5(7).Download