Physiology 3120 Chapter Notes -Splanchnic, Cholinergic, Tachycardia
3 Mar 2014
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Largest part of blood volume (70%) is contained in venous system. Location & function of heart valves: right heart, right atrioventricular (av) valve (tricuspid) located between right atrium (ra) & right ventricle (rv, pulmonic valve (pulmonary valve) valve between pulmonary artery & rv, when rv contracts (systole), pressure. Rv rises causing closure of right av valve & opening of pulmonic valve: right av valve (& left av valve) prevents backflow of blood from rv to. Striated in the same manner as skeletal muscle. Typical myofibrils that contain actin & myosin filaments almost identical to those found in skeletal muscle (isoforms) Filaments interdigitate & slide along each other during process of contraction in the same manner as occurs in skeletal muscle (involves ca2+: differences. Fibres branch and recombine yet each fibre is a complete unit surrounded by a cell membrane sarcolemma. Action: during diastole, membrane potential slowly drifts toward a less negative value (diastolic depolarization due to higher permeability of the.
