I think it is a good example of integrated science because it involved a dissection as well as experimental science. The text on pages 263-267 will be helpful. The end plate potentials depolarizes skeletal muscle fibers caused by neurotransmitters binding to the postsynaptic membrane in the neuromuscular junction. On the spur of the moment, she carries out a little exploring which results in her believing that the land that was bought by Pacific Gas and Electric is the identical property that had hexavalent chromium contamination resulting from Pacific Gas and Electrics environmentally negligent activities. How will its survival be affected once it no longer is attached to the circulatory system? The heart was kept moist with ringers throughout the entire experiment.
Once the heart rate was back to normal or as close as it would get at this point , the final reagents were injected. Complete this table based on measurements of your experimental records. Thus, the latent period does not change with different stimulus. Then the recording was continued until there was no ventricular contraction in the mechanical record. Almost all chemical reactions in a biological cell need enzymes in order to occur at rates sufficient for life. Place the frog on a clean dissecting pan.
Describe the force of contraction with each subsequent stimulus. Carbon dioxide, Energy, Heat 456 Words 3 Pages Lab Report: Stoichiometry Lab Oct. Artery, Blood, Cardiac anatomy 1300 Words 5 Pages tapings before taking down the readings and make sure that we avoid parallax error by ensuring our eyes is leveled with the tapings when recording the readings. Izquierdo Analysis of Macromolecules in Tissue Homogenates of Bos taurusMaterials and Methods The homogenates provided were made by homogenizing tissues in a sucrose phosphate buffer in a 1:20 ratio. During this pause, the ventricles swelled much more than normal and then finally contracted.
We removed all that was available and then began to add sodium carbonate to help wash and dry the mixture. Head loss in piping system. Acetylcholine, Actin, Isometric exercise 606 Words 6 Pages Laszlo Vass, Ed. We used the program LabScribe to collect the data from the graph, and we also used the stimulator to stimulate the muscle through computer. The threshold is that intensity voltage of stimulus which brings response. Discussion among group members at the beginning of lab.
These tests were the startle, stroop, Valsalva maneuver, diving reflex, and a test of our choice. Might it be necessary to use both programs? By varying the number motor units groups of muscle fibers innervated by a singe somatic motor neuron contracting at a given time, the amount of tension generated by the whole muscle can vary. Then, systematically, break off one section at a time to calculate. Before leaving lab Review the data provided by your classmates in the spreadsheet and consider whether the data fits your projections regarding the types of myofibers that predominate in each muscle given the normal role of that muscle in the frog's body. Carbon dioxide, Cell nucleus, Eukaryote 1091 Words 4 Pages platform it shows why it is harder to drive on some surfaces then others. Density Grams Moles Acetone Flammable, Irritant 58.
During this lab, each group of 3 students will be provided with a frog gastrocnemius muscle or a wrist extensor muscle, a PowerLab computer setup including a force transducer also known as a strain gauge , ringstand, clamps, micromanipulators, dissecting tools, pin electrodes for stimulation, and 0. Later, between 1737-1798 Luigi Galvani determined that frog muscle responded to electrical currents. The hemoglobin then reacts with the nitrites to form Methemoglobin. By studying genetics and inheritance, plants and animals have progressed biologically which means they are more productive and in cases, have more nutrients. Lab 6 Biomechanics of Frog Skeletal Muscle I.
Arithmetic mean, Mean, Measurement 1310 Words 4 Pages listed below. We needed for this experiment a hot plate, clamps, pipette, 5mL vial, caps, hoses and a thermometer. The problem it is trying to explain is, how does table salt affect the boiling temperature of water? Cut the tendon distal to this knot. Myofilament: Actin- or myosin- containing structure. A motor unit consists of a a and all the b it innervates. When stimulated at the right time the heart would have an extra systole event, when iv en an excitatory neurotransmitter the heart rate and contraction force would increase, etc.
As the voltage was increased from threshold to maximum voltage, there was a greater force in the muscle contraction. Lab 6 Biomechanics of Frog Skeletal Muscle I. For the first experiment, we will find the lowest voltage needed to start a muscle action potential and cause contraction. After the reaction was done taking place, we began to purification process. That stimulus intensity is the threshold for the most sensitive fibers in your muscle. Create an electromagnet made of an iron nail with 5 loops of copper wire around it.