The heart rate surely decreased and after all the heart stopped as I predicted. Review Sheet Results Explain why the larger waves seen on the oscilloscope represent the ventricular contraction. Why is it only possible to induce an extrasystole during relaxation?
An extrasystole corresponds to You correctly answered: Enter the number of ventricular contractions per minute from the heart rate display in the field below and then click Submit to record your answer in the lab report. Watch the contractile activity from the frog heart on the oscilloscope.
The cardiac action potential is longer than the skeletal muscle action potential. Cardiac cells have longer twitches than any other muscle cells.
However, the resting heart rate is approximately 70 beats per minute, which suggests that You correctly answered: The heart rate will decrease and the heart will stop. The ventricles must contract and relax fully with each beat to pump blood.
The main anatomical difference between the frog heart and the human heart is that the frog heart has You correctly answered: Explain why the amplitude of the wave did not change when you increased the frequency of the stimulation.
Parasympathetic stimulation reaches the heart through You correctly answered: How well did the results compare with your prediction? Research shows that, in the absence of neural and hormonal influences, the SA node generates action potentials at a frequency of approximately times per minute.
Vagal escape probably involves You correctly answered: The SA sinoatrial node in the human heart is located You correctly answered: Enter the number of ventricular contractions per minute from the heart rate display in the field below and then click Submit to record your answer in the lab report.
Experiment Results Predict Question: As I correctly predicted the cardiac muscle tissue did not show neither wave summation nor tetanus. Second, initiation of a rhythm by the Purkinje Fibers Describe how the sympathetic and parasympathetic nervous systems work together to regulate heart rate.
The extrasystole can not occur until relaxation and so we could not achieve wave summation tetanus. If you deliver multiple stimuli 20 stimuli per second to the heart, what do you think will happen? The branch of the autonomic nervous system that dominates during exercise is You correctly answered: Explain two ways that the heart can overcome excessive vagal stimulation.
The sympathetic nervous system increases heart rate and parasympathetic decreases heart rate. Extreme vagus nerve stimulation affects the heart by You correctly answered: Amplitude did not change because of the cardiacs long refractory period, as predicted.
How well did the results compare with your prediction? What do you think would happen to the heart rate if the vagus nerve was cut?
Because ventricle contraction is strengther than atrial contraction.
When you increase the frequency of the stimulation, what do you think will happen to the amplitude height of the ventricular systole wave?Ex 28B:Endocrine System Physiology: Computer Simulation Data Sheet Bio Lab: PhysioEx Ziser, Effects of Hormones on Metabolic Rate: Normal Rat Thyroidectomized Rat Hypophysectomized Rat Baseline weight (gms) ml oxygen used/min (ml) ml oxygen used /hr (ml) Microsoft Word - Physioex.
Exercise 6: Cardiovascular Physiology: Activity 2: Examining the Effect of Vagus Nerve Stimulation Lab Report Pre-lab Quiz Results You scored % by answering 4 out of 4 questions correctly.
PhysioEx includes updated and expanded content and new activities for the Endocrine System Physiology exercise. This new version also includes seven videos that show students how to relate their PhysioEx simulation to a real wet lab experience and demonstrate the following experiments: Skeletal Muscle, Blood Typing, Cardiovascular.
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Lab 28B: Endocrine System Physiology Computer Simulation Introduction The endocrine system is the second greatest control system of the body and has many effects on the tissues and organs.
The thyroid gland. Hi please help! I have assignments in the physioex on pages 59 - 61 for exercise 4, pages - for exercise 11, pages 85 - 87 for exercise 6, pages 73 - 75 for exercise 5.Download