Lab Cardiovascular

Week 12 - Exercise 6: Cardiovascular Physiology Worksheet
pupil Name:

Student book of instructions: Follow the step-by-step instructions for this exercise found in your text and record your answers in the spaces below. Submit this completed document by the assignment payable date found in the Syllabus. Rename this document to imply your first and name prior to submitting, e.g. Week12-Exercise6_JohnSmith.doc. *** Include your name in the area above, by Student Name *** Please prevail sure that your answers are typed in RED.

Electrical Stimulation
Activity 1: Direct Heart Stimulation
1. Did you see any change in the describe? No
2. Why or why non? It necessarily more stimulation
3. Did you see any change in the singularity? Yes
4. Why or why not? Stimulation is doubled
5. puff the change you see in the trace. How does it differ from the baseline trace? It increased in comparison to the baseline trace
6. What effect do the repeated stimuli have on the lifebeat trace? chance on the trace. The heartbeat stopped
7. What part of the trace shows the refractory period? atrial contraction
8. Does summation occur? No
9. Why is it important that summation not occur in heart musculus? Heart muscle contractions increase causing a heart attack.





Activity 2: Vagus Nerve Stimulation
10. Describe the effect of the vagus warmness stimulation on the heartbeat. It decreases the heart appraise and declines the force of the contraction.
11. in brief after you applied the stimuli, did the heart rate increase or decrease? Decrease
12. Why? Acetylcholine is released by the vagus nerve.
13. How do the philanthropic and parasympathetic nervous systems work to ingesther to regulate heart rate? Sympathetic neurons increase the heart rate composition the parasympathetic neurons decrease the heart rate and the heart at the same time receives both neurons signals.
14. Complete the following: As heart rate decreases, cardiac output decreases (assuming stroke volume remains...If you want to get a full essay, order it on our website: Orderessay



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