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1. Outline the steps of electrical conduction through the mammalian heart. 2. What is the importance of...

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Biology

1. Outline the steps of electrical conduction through themammalian heart.

2. What is the importance of the skeletal muscle and respiratorypumps?

3. What happens to heart rate, stroke volume, cardiac output,mean arterial pressure, and patterns of blood flow at the onset ofexercise in humans?

Answer & Explanation Solved by verified expert
3.7 Ratings (501 Votes)
1 Electrical conduction through the heart a Impulses are generated in the sino atrial node or AV node The have the ability of self excitation which causes automatic rhythmical discharge and contraction b These impulses pause at the atrioventricular node 01s They are the anterior middle and posterior internodal pathways c The atrio ventricular bundle connects the atria to the ventricles The atrial conductive system is organised so taht cardiac impulse do not travel from atria to ventrciles too rapidly And this delay time allows the atria to empty their blood to ventricles before ventricular contraction begins d Impulse after travelling through internodal pathways reaches AV node about 003 sec after its origin in    See Answer
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