Psychology 2036A/B Lecture Notes - Lecture 19: Blood Pressures, Atrioventricular Node, Stroke Volume

• School: Western University
• Department: Psychology
• Course: Psychology 2036A/B
• Professor: Doug Hazelwood

Document Summary

Ve never approaches maximal capacity (mvv) and vt never approaches vc. Your ventilation than what is required for the o2 you are actually using. As far as getting o2 into the blood and to the tissue, ventilation is greater than required for than o2 conc. High cardiac outputs- reduced time for o2 diffusion into the lungs. The faster the blood goes the less gas you have diffusing. Sv= stroke volume a-vo2diff (tissue)= arterial venus oxygen difference. If you have the same o2 arriving and less leaving the avo2 difference is greater. Blood volume is around 5liters (dependant on body size) Arteries= resistance vessels can change diameter very quickly. As diameter of tube changes, resistance is going to change dramatically. Veins= capacitance vessels: where blood is pooled on venous side of ventilation at rest. Enables to depolarize the atria before the ventricles contract. Ventricles contract later due to delay in depolarization due to av node.