2/18/2020 PhysioEx Exercise 6 Activity 2 2/4 Stop & Think Questions Experiment Data Post-lab Quiz Results Your answer: The heart rate will increase. Watch the contractile activity from the frog heart on the oscilloscope. Enter the number of ventricular contractions per minute (from the heart rate display). You answered: 60 beats/min. 1 The vagus nerve carries You correctly answered: signals that decrease the heart rate. 2 Enter the number of ventricular contractions per minute (from the heart rate display). You answered: 60 beats/min. 3 The response that resumed the heartbeat after the vagus nerve stimulation is called You correctly answered: vagal escape. 4
2/18/2020 PhysioEx Exercise 6 Activity 2 3/4 You scored 100% by answering 4 out of 4 questions correctly. Review Sheet Results Extreme vagus nerve stimulation affects the heart by You correctly answered: stopping the heart completely. 1 Vagal escape probably involves You correctly answered: sympathetic reﬂexes. 2 Research shows that, in the absence of neural and hormonal inﬂuences, the SA node generates action potentials at a frequency of approximately 100 times per minute. However, the resting heart rate is approximately 70 beats
You've reached the end of your free preview.
Want to read all 4 pages?
- Spring '08
- Sinoatrial node, session ID