Hint: Superficial facial muscles are attached at one end to skin. Restate your predictions that were correct and give the data from your experiment that supports them. Eating improperly prepared puffer fish sushi can be fatal because of interference with action potential generation. Why was this muscle fiber length and stimulation voltage used? See Table 2: Effect of Temperature on Sucrase Activity See Graph, Effect of Temperature on Sucrase Activity 2. Controlled Variables: temperature, stimulation voltage, frequency of stimulation. Which part of the neuron was stimulated? In Experiment 2, explain why the membrane potential between the axon hillock and axon either changed or did not change with threshold stimulus.
This is achieved by a rotor or. These things are the cause of the earth heating up, or global warming. The stimulus causes depolarization in either the nerve or muscle. Plasma ketone levels will be highest before the meal fasting. Results Table 3: Membrane Potentials at Different Stimulation Voltages, by Location. Independent Variable: stimulation voltage 3. The motor unit was stimulated 5.
Tetrodotoxin, a toxin found in puffer fish, acts by inhibiting voltage-gated sodium channels. Controlled Variables Experiment 2: Effect of Frequency of Stimulation on Action Potential Generation 1. Once the stimulation voltage rises above threshold, force generation increases as the stimulation voltage increases. The E-mail message field is required. Therefore Ach responsible for signaling muscles to contract is not released, and muscle contraction does not occur.
Discuss why maintaining plasma osmolality within normal limits is important. What was the force of contraction at a muscle length of 7. Explain how hypokalemia will initially affect the resting membrane potential and the generation of an action potential. The department needed a way to deliver this content digitally, with assessments and lab reports that could be transmitted online as well and autograded wherever possible. Even when the plasma osmolality is water loaded it still does not change.
Independent Variable: muscle fiber length. Click the Skeletal Muscle Cross Section and identify each of the following. If the stimulation voltage was increased to 600mV volts, would the force of contraction decrease, stay the same, or increase? Our extensive online study community is made up of college and high school students, teachers, professors, parents and subject enthusiasts who contribute to our vast collection of study resources: textbook solutions, study guides, practice tests, practice problems, lecture notes, equation sheets and more. Contents: Activity 1: Enzyme Activity Activity 2: Twitch Contractions and Summation Activity 3: Recruitment and Contractions Activity 4: Generation of Action Potentials Activity 5: Blood Glucose Regulation Activity 6: Effect of Exercise on Cardiac Output Activity 7: Effect of Exercise on Arterial Pressure and Vascular Resistance Activity 8: Respiratory Volumes Activity 9: Regulation of Pulmonary Ventilation Activity 10: Influence of Fluid Intake on Urine Formation Responsibility: Connie Allen et al. An increase in the Ca level in the sarcoplasm starts the sliding of thin filaments, but when the level of Ca in the sarcoplasm declines, sliding will stop. Explain how this prevents skeletal muscle contraction. At what stimulus voltage s did an action potential occur? Water loading decreases urine osmolality.
Eating improperly prepared puffer fish sushi can be fatal because of interference with action potential generation. With our help, your homework will never be the same! Explain why the temperature of the water bath was 35ºC 95 ºF. Human resources and the services they provide can be seen as the crucial link between staff and the achieving the business goals and objectives. Dependent Variable is the contraction force. Users can view data in either a graphic or tabular format. We like to keep things fresh.
State the amount of time between stimulations for each frequency of stimulation. As a result the total force produced by the muscles increases. Materials and Methods Measurement of Threshold Stimulus 1. State whether dehydration results in production of a concentrated or dilute urine. Plasma insulin levels will be highest 1-3 hours after the meal.
In Experiment 2, explain why the number of action potentials generated varied with increased stimulation frequency. State the amount of time between stimulations for each frequency of stimulation. Controlled Variables are the temperature and stimulation voltage. Water consumption measured urine output, and a finger stick. An osmometer was used to check osmolarity Water consumption measured urine output, and a finger stick. What type of assay was used to measure plasma glucose and ketone levels? We started by conducting a needs assessment to determine the overall course design, structure, and content strategy. In the first experiment the measurements were made at a muscle length of 9mm.