Frog muscle contraction is a phenomenon that has been widely studied by researchers in the field of physiology. The purpose of this lab report is to provide an overview of the methods and results of an experiment that was conducted to study the muscle contraction in frogs.
The experiment was conducted using a dissected frog leg as the experimental specimen. The leg was placed in a solution of normal saline, and a series of electrodes were attached to the muscle tissue. The electrodes were used to stimulate the muscle tissue, causing it to contract.
To measure the contraction of the muscle, a force transducer was used. The force transducer was attached to the muscle tissue and measured the force of the contraction. The results of the measurement were then recorded on a computer.
The results of the experiment showed that the muscle contraction in the frog leg was strong and rapid. When the muscle tissue was stimulated, it contracted quickly and with a great deal of force. The force of the contraction was also found to be proportional to the strength of the stimulation.
One of the main conclusions that can be drawn from this experiment is that the muscle tissue in the frog leg is highly responsive to stimuli. The quick and strong contraction of the muscle tissue demonstrates the ability of the frog leg to respond to environmental stimuli and to perform various movements.
Overall, the results of this experiment provide valuable insights into the mechanics of muscle contraction in frogs. The findings of this study may be useful in the development of treatments for muscle-related disorders, as well as in the study of other physiological processes in frogs and other animals.
FROG SPINAL REFLEX AND MUSCLE STIMULATION INTRODUCTION:- In that lab we were given a frog for the lab experiment. When stimuli are applied at a high frequency, the muscle does not have time to completely relax and their contractions are added together, producing a wave summation. Watch the contractile activity from the frog heart on the oscilloscope. Tension responses to rapid pressure release in glycerinated rabbit muscle fibers. There are two types of muscle contractions: Spatial and Temporal.
The ends of the Z discs overlap and this creates conflict in the formation of cross bridges. How does increasing stimulation frequency affect force production DISCUSSION 1. According to the Centers of Disease Control and Prevention CDC , every year about 935,000 people in the United States suffer from a heart attack and about 600,000 die from heart problems. The myosin binds to actin, forming crossbridges, and releases a phosphate group, contracting the myosin head. To access the sciatic nerve, the frog must be dorsal side up.
When the muscle is stimulated at a high frequency and does not relax at all in between stimuli, contraction is sustained at a constant level. Set up the apparatus so as to eliminate or minimize artefacts. The experiment also calls for an understanding of cardiovascular compensation. For example, during the first trial, the heart rate went from 20 H. Lastly, the effects of temperature, hormones, and ions will be understood. All Answers ltd, 'Investigation of Frog Gastrocnemius Muscle Contraction' UKEssays. Understanding how they generate contractions is valuable information for not only physicians but also body trainers and coaches.
Physiology lab report on gastronemius frog muscle Free Essays
The force transducer was …show more content… Beginning at a stimulus voltage of 0. Sodium then triggers action potential that travels across the sarcolemma and into the T Tubules. EC coupling is a process involving the entry of Ca2+ into the muscle fibres following a stimulus, and activation of actin-myosin cross-bridges Moyes and Schulte, 2008. Significance: Ca channel blockers alter cardiac rate but not skeletal muscle contraction. What is the threshold stimulus 2.
The myofilaments are split in two categories, thin and thick. How might one establish what the optimal length is for a particular muscle? The rate of contraction is also referred to as the heart rate, which is usually measured in beats per minute. The large contracture tensions observed in denervated muscles are not due to the greater depolarization produced by the drug in denervated muscles since innervated muscles depolarized to the same level by external K + do not enhance caffeine contracture tension. Then on each slide putting 2-3 drops of one of the solutions A, B and C. These are some of the interesting questions for current and future investigation. An individual muscle fiber follows the all-or-none principle—it will either contract 100% or not at all. No other length allows the same amount of travel and coupling.
Investigation of Frog Gastrocnemius Muscle Contraction
What is the maximum force generated at the threshold stimulus 3. This can happen when Async Darla JS file is loaded earlier than Darla Proxy JS. Single channel measurements of the calcium release channel from skeletal muscle sarcoplasmic reticulum. The conduct impulses to the myofibrils and ensure that they will all contract at the same time Hoehn Marieb Force of Muscle Contraction Lab Report To produce a muscle contraction, the muscle fibers need to first be stimulated a motor neuron. Skeletal muscle must be electrically stimulated to contract. Around the limbs, the muscles contain a very elastic protein known as titin Ting, 2012,. As the postsynaptic cells on the muscle cell membrane receive the acetylcholine, the channels for the cations sodium and potassium are opened.
What proportion of the ±bers in the muscle do you think were contracting to produce this small response? Rather, drugs mediate smooth muscle contraction, for example acetylcholine Ach that bind onto receptors and cause the calcium into the smooth muscle cell causing it to contract Devine et al. Record EXAMPLE DATA EXAMPLE DATA EXAMPLE DATA EXAMPLE DATA 0. How will the velocity of contraction be determined from the recordings? Later, between 1737-1798 Luigi Galvani determined that frog muscle responded to electrical currents. Muscle degenerationfollows damage to the motor nerve pathway because proper neuromuscular activity and resulting muscle tone seem to be requiredfor the health of the muscle. Society for Industrial and Applied Mathematics, Gibson F, of the sensor and of the stimulus electrodes. Skeletal muscles are connected to bones by You correctly answered: b. The wires in a single-chamber pacemaker carry pulses from the generator to the right ventricle.
Cardiac output and cardiac index - SV x HR. Again no force can be generated by the fiber with stimulation. Most important advice: The only factor that is allowed to change is the load. In this experiment, the effect… Ekg Measurement and Interpretation at Rest and During Exercise In the United States, people suffer from heart problems every day. Contraction ends, and the muscle enters the relaxation phase Hoehn Marieb A twitch is a response to a single stimulus.