ANSC 3080 Lecture Notes - Lecture 9: Tachycardia, Skeletal Muscle, Cardiac Arrhythmia

• School: University of Guelph
• Department: Animal Science
• Course: ANSC 3080
• Professor: Gregoy Bedecarrats

Document Summary

There is no marbling in the heart. Concentrated at specific areas of the heart. Keeps the heart beating even when taken out of the body as long as there is nutrient. Contractile cells all share a bit of their cytoplasms because of gap junctions. Water-filled pores forming openings to connect cells. Allow free ion flow from cell to cell, therefore direct communication between cells without synapsis. One cell environmental change will impact the nearby cells to do the same, ap jumps from cell to cell, so that the contraction is synchronized. Located in the right upper corner inside ra. It has the fasted contraction rate, therefore determines the overall heart rate. Other pacemakers can contract as well, just slower. Located at the bottom left corner inside rv. Transduct signal from the ra to rv. Valves are made up of ct that is not conductive, so without av node, the impulse will not be able to travel from ra to rv.