Effects of Electrical Stimuli and Injected Reagents on Frog Hearts Melissa Higdon Section 05‚ Group 01 November 19‚ 2013 Introduction: The heart is a very complex muscle for all species. It is responsible for sending oxygenated blood throughout the body as well as sending deoxygenated blood to the lungs‚ and continuously circulate this way for as long as we are alive. Many things can be effected‚ for example how fast the heart beats or how much
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question: how do bull frogs compare and contrast to humans ? background info; A. animal kingdom B. rana castles beiana C. There habitat is anywhere near water and are mostly located in eastern america D. The bullfrog is a vertebrate because bullfrogs has a skeleton E. They have an endoskeleton because there skeleton is inside their body not outside F. Cold blooded because their body temperature need to change with the environment G. A bullfrog life cycle starts with the female and male frogs mating . The
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the summation started at 16Hz‚ and it reached tetanus at 64Hz‚ for the optimal length‚ we did not get enough time to finish it‚ and it should be somewhere higher then 35 mm. Introduction: Introduction: Methods: First‚ we needed to prepare the frog by remove the skin from the leg and cut off the muscle on the femur‚ and find the gastrocnemius muscle‚ which is the big muscle on the lower leg‚ and then we found the tendon of Achilles that is below the heel‚ and cut it at the lowest point of the
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The purpose of this experiment is to study the effects of Ca2+ channel blockers in muscle contraction by observing the effects of injecting it in frog legs. Since calcium channel blockers‚ block the Ca2+ channels‚ inhibiting the calcium from binding to troponin‚ which exposes the myosin binding site‚ we hypothesize that the muscle fibers will not be able to contract to the same extent and therefor
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Results A left gastrocnemius muscle of a frog (L=3.2cm in situ) was used in experiment 1 and 2‚ while a right gastrocnemius muscle of a frog (L=3.4cm in situ) was used in experiment 3. The sciatic nerve of the frog was placed over the stimulatory electrodes covered with a piece of a Kimwipe moistened with Ringer’s solution. The relationship between muscle length‚ force production and velocity of contraction was studied. Force transduced calibration In order to get a more accurate data from force
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The purpose of this experiment is to examine the results of stimulation on a frog’s sciatic nerve by looking at its compound action potential‚ the conduction velocity‚ and by quantifying the total and absolute refractory period between the nerve at room and cold temperature. An oscilloscope‚ preamplifier‚ and stimulator were used to stimulate the frog’s nerve located in the nerve chamber. Threshold voltage was determined by stimulating the nerve at increasing voltages until a compound action potential
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Stimulus-Dependent Lab A motor unit is a motor neuron and the muscle fiber it controls. A whole muscle is made up of hundreds of motor units that are handled by different motor neurons that react at different levels of stimulation. The electric shock acts as an action potential by changing the membrane permeability allowing the sodium and potassium ions to pass through. At different levels of stimulation the motor neurons stimulate a motor unit and the more stimulation the more motor units become
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Lab 6 Biomechanics of Frog Skeletal Muscle I. Purpose This exercise is designed to demonstrate some mechanical and physiological properties of skeletal muscle using the gastrocnemius muscle of a frog. II. Performance Objectives At the end of this exercise the student should be able to: 1. Define minimal (threshold)‚ subminimal‚ maximal‚ and supramaximal stimulus. 2. Explain what is meant by a “graded” response. 3. Draw a diagram of the setup used in this lab exercise. 4. Calculate the
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Daniel Semon “The Frogs” essay 9-18-2014 How has political satire really changed over the years? The onion‚ The Colbert Report‚ The daily show‚ and Saturday Night Live: what do all of these have in common? They spread the news and awareness but portray it in a comedic way. This is known as political satire‚ which gives light and laughter to serious topics around the world. Aristotle defines comedy as a representation of laughable people and involves some kind of blunder or ugliness that does
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Frogs Dissection: 1. Where is the frog’s heart compared to its lungs? How do the locations of these two organs affect interactions between the frog’s respiratory and circulatory systems? The frog’s heart is in front and above the liver while the lungs are under the liver and off to the sides. The locations of these two organs affect interactions between the frogs’s respiratory and circulatory systems because a frog’s heart needs oxygen which is required from the lungs therefore the circulatory
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