HTHSCI 1H06 Lecture Notes - Lecture 3: Resting Potential, Skeletal Muscle, Sodium Channel
10 Oct 2017
School
Department
Course
Professor
Document Summary
Describe the structural and functional characteristics of cardiac muscle tissue and the. Define cardiac output, stroke volume and heart rate. If all autonomic input were stopped the heart can still contract itself bc it has the ability to generate its own pacing. it has pacemaker cells. Skeletal muscle really big, cardiac is the next biggest and smooth tiny. 1-2 nuclei in each of those myocardial sites. Each cardiac myocyte is connected to its neighbour by structural proteins called desmosomes helping glue those cells together by gap junctions a functional syncytium. In the intercalated disc there are 2 very important proteins; desmosomes and gap junctions; one for structural support and one for electro bulb connectivity btw those cells. Always need the atria to contract first, a slight pause to allow that blood to fill up the ventricle and then the ventricles must contract.
