Preview

Long Lab Report Blackworm

Good Essays
Open Document
Open Document
486 Words
Grammar
Grammar
Plagiarism
Plagiarism
Writing
Writing
Score
Score
Long Lab Report Blackworm
Heart rate in black worms with and without added glucose
Introduction:

The circulatory system is important in circulating blood, nutrients, oxygen and chemicals to the body. A circulatory system commonly consists of the fluid it contains, such as blood, a pumping vessel such as a heart, and the vessels, which carry the fluid through the body. In a closed circulatory system, the fluid, blood, is contained within the vessels as it circulates through the body. The Lumbriculus variegates, or blackworm, is commonly found in stagnant water along the edges of marshes and ponds. Blackworms have a closed circulatory system, which in the blackworm includes a large dorsal blood vessel [1]. Glucose is the most common carbohydrate and is classified as a monosaccharide and is a reducing sugar. Glucose is called blood sugar as well because it circulates in the blood. When blood glucose is high, the pancreas releases insulin, which then helps to transport glucose into muscle or liver cells. There, it's used for energy. If there's more glucose present than needed, insulin helps the glucose to be stored in adipose tissues as fat for potential future energy needs. One immediate effect of the breakdown and conversion of glucose into cellular energy is an increased metabolism, which can manifest itself in the form of increased heart rate, high blood pressure or some other form of arousal such as heightened mental alertness [4]. If the black worms are placed in a glucose solution, breakdown and conversion of glucose will be inhibited and cause their hearts to beat faster. In this experiment, it was hypothesized that when black worms were exposed to a solution of 1mM glucose, their average pulsation rate per minute would increase.

Methods: The procedure of Lab 7 was the same as Lab 6 – Part B except the black worms were exposed to a glucose solution before their pulsation rates were measured.

Results:

In this experiment black worms that were exposed to only

You May Also Find These Documents Helpful

  • Good Essays

    Meanwhile, in the mealworms from dark treatment, their rate of respiration in the twelve experimental tubes ranged from 0.0417 mL…

    • 1032 Words
    • 4 Pages
    Good Essays
  • Good Essays

    Lab Report

    • 1398 Words
    • 6 Pages

    The homogenates provided were made by homogenizing tissues in a sucrose phosphate buffer in a 1:20 ratio. The protein concentration in bovine cells was measured by diluting the homogenate with a 1:5 ratio; 50 microliters of homogenate and 200 microliters of water. Then 5 known protein concentration samples which were 0.4, 0.8, 1.2, 1.6, 2.0 mg/ml of bovine serum were used to determine absorbance with a spectrophotometer. Two additional samples were made; one was blank and the other was for the specific homogenate sample. Then 3 microliters of bradford assay reagent, which indicates the amount of protein present by color, was added to all samples. The spectrophotometer was zeroed at 595 nm. A standard curve was made with the different absorbencies and concentrations. After the linear equation was formed, the unknown sample concentration was determined using the standard curve equation. A Gel Electrophoresis was used to perform a qualitative analysis. The use of 5 microliters of the homogenate was heated to 80 degrees Celsius. Then the homogenate was transferred to a 2-microliter-protein gel sample buffer. Samples loaded on to the gel was run at 100 v and stained with comassie blue; observations were made next lab. (Clendening 2014)…

    • 1398 Words
    • 6 Pages
    Good Essays
  • Satisfactory Essays

    Lab Report

    • 597 Words
    • 3 Pages

    The purpose of this experiment is to see whether or not temperature plays a role in the percent change during diffusion or osmosis.…

    • 597 Words
    • 3 Pages
    Satisfactory Essays
  • Better Essays

    The cardiovascular system consists of the heart, blood and blood vessels. The cardiovascular system is the major transport of materials to and from the cells. Blood is carried from the heart around the body via the arteries and the blood is then carried back to the heart via the veins. The capillaries connect the arteries to the veins; the function of the capillaries is too supply the cells with nutrients and oxygen. The cardiovascular system is responsible for the transport of oxygenated blood around the body. It will transport these to the cells and collect the deoxygenated blood which is ready for the excretion from the cells. The cardiovascular system will deliver the nutrients oxygen and glucose via the blood stream. Oxygen is need for aerobic respiration to occur.…

    • 1052 Words
    • 5 Pages
    Better Essays
  • Good Essays

    The cardiovascular system carries oxygen and glucose to the cells and transports waste products such as co2 and urea away from the cells and to other parts of the body, such as the lungs and kidneys. Adenosine triphosphate, also known as ATP, is a chemical energy that is produced when nutrient molecules are burnt. ATP is constantly being produced on a daily basis due to the breakdown of glucose. Glucose is a sugar which is the main source of energy for the body. Glucose is broken down and the energy from the glucose molecule chemical bonds are released and utilized by the cell…

    • 1354 Words
    • 4 Pages
    Good Essays
  • Powerful Essays

    Stickleback Lab

    • 3141 Words
    • 13 Pages

    Stallsmith, B. Laboratory Manual for Organismic Biology. 2nd ed. Mason (OH): Cengage; 2006. p. 9-17.…

    • 3141 Words
    • 13 Pages
    Powerful Essays
  • Satisfactory Essays

    Lab report

    • 613 Words
    • 3 Pages

    Observations: The color changing process took longer than we had expected. We observed that after putting the penny in the beaker, the zinc powder surround the penny, which helped it changed its color. We couldn’t complete the experiment so when we took the penny from the beaker, the change in the color wasn’t completed. There were some dark spots and some light parts.…

    • 613 Words
    • 3 Pages
    Satisfactory Essays
  • Good Essays

    lab report

    • 623 Words
    • 3 Pages

    Obtain for dry test tubes and number them 1 through 4. Prepare two dry Pasteur pipets with bulbs attached. Place 9.0 mL of hexane, 2.0 ml of acetone, and 2.0 mL of solution of 70% hexane-30% acetone into separate Erlenmeyer flask. Label and stopper each flask. Place 0.3 mL of a solution containing fluorine and fluorenone into a small test tube. Stopper the test tube. Prepare one 10-cm x 4.3 cm TLC with four marks for spotting. Prepare four micropipets to spot the plates.…

    • 623 Words
    • 3 Pages
    Good Essays
  • Satisfactory Essays

    Respiration Lab

    • 717 Words
    • 3 Pages

    The objective of this lab was to figure out which has a higher cell respiration rate between crayfish and elodea. In order to figure this out we first set up three beakers to represent our control, elodea and crayfish and filled them with 75mL of culture solution which were dechlorinated making the solution acidic. We then had to place both the elodea and the crayfish in separate beakers filled with 25mL of water. The increase in volume of the water would represent the volume of the two test subjects. We then covered each beaker with plastic, but for the elodea we placed it under a can so it could be in the dark. After waiting 15 minutes to allow them to respire we took it out and add four drops of phenolphthalein, which was also acidic, to both beakers. Once both beakers got their four drops we added drops of NaOH, which was a base, until the solution turned pink. Our results were that the respiration rate of the crayfish was higher than the elodea.…

    • 717 Words
    • 3 Pages
    Satisfactory Essays
  • Satisfactory Essays

    Lab Report

    • 317 Words
    • 2 Pages

    In this lab, we will take a trip to the planetarium lab and will learn about Right ascension and declination, and altitude and zenith. After looking at the different points shown, we will log the altitude and zenith in the chart in our lab manual. Now we will look at the same points and label the right ascension and declination. Then we will learn about the easiest way to locate the star Polaris.…

    • 317 Words
    • 2 Pages
    Satisfactory Essays
  • Satisfactory Essays

    Lab Report

    • 316 Words
    • 2 Pages

    apply an analytical technique to estimate the relative length of each stage of the cell cycle.…

    • 316 Words
    • 2 Pages
    Satisfactory Essays
  • Powerful Essays

    Lab Report

    • 1310 Words
    • 6 Pages

    The cold pressor test is done by having the subject submerge their hands in a bucket of cold water to determine cardiovascular changes such as blood pressure and heart rate. For this experiment we wanted to know how long participant can keep their feet in the bucket of ice water before they experience any pain while looking at neutral and positive pictures and also rate the intensity of their pain. For this reason we hypothesized that, if participant submerged their feet in a bucket of water while looking at the positive stimulus, it would take them a long time to experience pain and will keep their feet in the bucket of ice for a long time than when participant are looking the neutral stimuli while they have their feet in the bucket of ice, we also hypothesized that heart rate will increase the longer participant keep their feet in the ice water. The null hypotheses was that, if participant submerge their feet in a bucket of water while looking at positive stimulus, it would take them the same amount of time to experience pain as when they are looking at the neutral stimulus and that heart rate will stay the same throughout the experiment…

    • 1310 Words
    • 6 Pages
    Powerful Essays
  • Good Essays

    Daphnia Magna Experiment

    • 873 Words
    • 4 Pages

    Figure 1: Relationship between chemicals used and the control normal heart rate of the Daphnia magna…

    • 873 Words
    • 4 Pages
    Good Essays
  • Good Essays

    Unit 9 D2

    • 1563 Words
    • 7 Pages

    Insulin regulates the level of glucose in your blood. Glucose is a simple form of sugar found in foods and sugary drinks. It's absorbed by your body as a natural part of digestion and is carried around your body in your blood. According to Bupa health ‘’when glucose reaches your body tissues, such as muscle cells, it's absorbed and converted into energy’’. Insulin is secreted into your blood by your pancreas, which is a gland located behind your stomach. A shortage of insulin causes glucose to build up in your blood.…

    • 1563 Words
    • 7 Pages
    Good Essays
  • Good Essays

    The cardiovascular system, also known as the circulatory system, is composed of the heart, blood vessels, and blood. The term cardiovascular refers to the heart (cardio-) and blood vessels (vascular). The term circulatory refers to the circulation of the blood. The heart is a muscular pump and its regular contractions send blood into tough, elastic tubes called arteries, which branch into smaller vessels and convey oxygen-rich blood through the body. The arteries eventually divide into tiny capillaries, which have such thin walls, that oxygen, nutrients, minerals, and other substances pass through to surrounding cells and tissues. Waste substances flow from the tissues and cells into the blood for disposal. The capillaries join and enlarge to create tubes that eventually become veins, which take blood back to the heart. Vessels carrying oxygenated blood (usually arteries) are shown in red and those carrying deoxygenated blood (usually veins) are blue.…

    • 267 Words
    • 2 Pages
    Good Essays