Daphnia Lab Essay - 1153 Words

Daphnia and Additives Lab Purpose The purpose of this lab is to test what effect of Nicotine, Acetylcholine, Epinephrine, Caffeine, and Ethanol on an organism’s heart rate. Materials * Microscope * Eye dropper * Pipet * Cotton balls * Depression slide * Beakers * Daphnia * Water * Five additives: Nicotine, Acetylcholine, Epinephrine, Caffeine, Ethanol Procedure 1. Put on safety goggles. 2. Catch a living Daphnia. 3. Transfer to a depression slide and add water. 4. Add cotton ball fibers to restrict movement of the Daphnia. 5. Establish the resting heart rate of the Daphnia. Count the amount of beats for ten seconds then multiply that number by six to convert it to beats/min.†¦show more content†¦A slowed heart rate and the associated fall in the rate of expulsion of blood from the heart is sufficient to maintain body function during rest, and conserves energy in the heart under conditions where its supply (and the supply of oxygen in the blood) are diminished. A drug that slows heart rate is called a negative chronotrope. Epinephrine/adrenaline: Heart rate is increased by the sympathetic nervous system and the hormone adrenaline circulating in the blood via activation of cell surface receptors inShow MoreRelatedLab Report Daphnia1855 Words   |  8 PagesEffects of Alcohol, Caffeine, and Temperature on the Heart Rate of Daphnia magna Joseph Ezra Gallo BY124L MW 8:30-11:30 Introduction 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 isRead MoreDaphnia Heart Rate and Kcl1022 Words   |  5 PagesJuanita Sarmiento Daphnia Ecotoxicology Lab Report Introduction Ecosystems have a way of maintaining themselves under ordinary conditions but when a new factor is added that will most likely threaten the environment action needs to be put forth. Our environment is affected by many pollutants on a daily bases forming a threat to natural stability. For example some of the most polluted parts of the environment are bodies of water like that explained in our lab. Once pollution occursRead MoreThe Normal Heart Rate Of A Daphnia Magna1552 Words   |  7 PagesIntroduction The purpose of this lab was to determine the normal heart rate of a Daphnia Magna and decipher the different effects that various substances had on it. A Daphnia Magna is a species of water fleas and can be located in the Northern United Sates against the coastline of the Atlantic in rocky pools. The water flea’s habitat consists of rivers and streams, temporary pools, lakes and ponds, and brackish water. The Daphnia Magna range from two to five millimeters in length and are shapedRead MoreScientific Paper on a Water Flea751 Words   |  4 Pagesand Caffeine on the Heartbeat Rate in Daphnia Magnus ï ¿ ¼ Erika Huizenga Ashley Kofahl The Effects of Alcohol and Caffeine on the Heartbeat Rate in Daphnia Magnus Abstract The projects purpose was to determine the effects of alcohol and caffeine on the heartbeat rate in Daphnia Magnus. Our hypothesis is alcohol causes a decrease in heart rate, whereas caffeine causes an accelerated heart rate, predicting that the more caffeine we give the daphnia the faster it heartbeat rate will becomeRead MoreThe Effects Of Alcohol On The Heart Rate Of Daphnia Magna1341 Words   |  6 Pageswater crustacean Daphnia magna when exposed to caffeine and alcohol. Different Daphnia magnas were placed in a depression slide containing fresh water and later exposed to solutions of caffeine and alcohol. Each Daphnia magna had different responses. These data suggest there is an increase in heart rate when a Daphnia magna is exposed to caffeine and a decrease in heart rate when it is in a solution of alcohol. LAB REPORT Title: Physiological Changes in the Heart Rate of Daphnia magna When ExposedRead MoreThe Cardiovascular System Of Heart Rate978 Words   |  4 Pagesthe body in response to a need. To determine what exactly happens inside the body when these numerous factors come into play we set up various experiments that will give us a measurable outcome. The first experimental variable we tested in lab was physical stress and how it changes the heart rate in humans. The way heart rate is measured is via an instrument called an electrocardiogram (EKG) which is a machine that measures the electrical differences that correspond to heart beats. An EKGRead MoreIs Plant Defensive Compounds Used?1510 Words   |  7 Pagescause cardiac arrest to those herbivore attackers or animals that consume the plant. If this statement is compared to the experiment performed, the defensive compound used, the milkweed should increase the heart rate of the invertebrate observed (the Daphnia) or create at least a change in the insect. During the experiment, water was compared to the milkweed and the heart rate changes were observed under microscope looking at different magnifications. Looking at the data and results obtained, it was discoveredRead MoreThe Effects of Population Density on the Reproduction and Survival of Daphnia Magna2308 Words   |  10 PagesAbstract The population dynamics of Daphnia magna are observed under three different conditions; low, medium, and high density. The effects of different population densities on the survivorship and reproduction of Daphnia are observed over a two-week period within a lab environment. Over the two week period, the numbers of parent Daphnia alive and dead are recorded daily, along with the amount of offspring produced each day. From the main parameter investigated, the net reproductive rate, theRead More241 and Ibuprofen Solutions988 Words   |  4 PagesIbuprofen Abstract The project that I chose to research was the effect of Ibuprofen on the heart rate of the daphnia. The reason that I chose to do this was because many people in society use over the counter pain killers without really understanding any of the long term effects of this medicine other than clearing their aches pains, and swelling. One of the leading drugs on the market today is Ibuprofen which you may know as Motrin or Advil. Both drugs are identical except for quantity andRead MoreYeast Lab Report1416 Words   |  6 PagesYeast Lab Report Guidelines 1. Lab reports are to be computer-generated and double-spaced. All sections of the report must be written in paragraph form. 2. Do not use encyclopedias (Internet or otherwise), dictionaries ((Internet or otherwise), or personal web pages as sources for the report, this includes Wikipedia. You may use a textbook, lab manual, and/or article(s) in a published journal. You can find journal articles by going to the library website: http://www.lib.clemson.edu/ and selecting