BSC 2086 Physio Exercise 6 Activity 2

2/7/2021 PhysioEx Exercise 6 Activity 2




PhysioEx Lab Report
Exercise 6: Cardiovascular Physiology
Activity 2: Examining the Effect of Vagus Nerve Stimulation
Name: Naja Crothers
Date: 7 February 2021
Session ID: session-9ee6a38b-c82a-3fa8-4108-36d88df7353d

Pre-lab Quiz Results
You scored 100% by answering 4 out of 4 questions correctly.

1 The effect of the parasympathetic nervous system on the heart is
to

You correctly answered: decrease the heart rate.

2 The branch of the autonomic nervous system that dominates
during exercise is

You correctly answered: the sympathetic branch.

3 Parasympathetic stimulation reaches the heart through

You correctly answered: vagus nerves, which are cranial nerves.

4 The usual pacemaker of the heart

You correctly answered: is the sinoatrial node.

Experiment Results
Predict Question


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, 2/7/2021 PhysioEx Exercise 6 Activity 2


1 Predict Question: What do you think will happen if you apply
multiple stimuli to the heart by indirectly stimulating the vagus
nerve?

Your answer: The heart rate will increase.

Stop & Think Questions
1 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: 61 beats/min.

2 The vagus nerve carries

You did not answer this question.

Correct answer: signals that decrease the heart rate.

3 Enter the number of ventricular contractions per minute (from the
heart rate display).

You answered: 61 beats/min.

4 The response that resumed the heartbeat after the vagus nerve
stimulation is called

You correctly answered: vagal escape.

Experiment Data




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