BIOL1008 Lecture Notes - Lecture 13: Pulmonary Circulation, Sympathetic Nervous System, Circulatory System
9 Jun 2018
School
Department
Course
Professor
Lecture 13: Form and function
Cardiac anatomy
- The right side of the heart receives blood from the systemic circulation and pumps it
into the pulmonary circulation (low pressure circulation).
- The left side of the heart receives blood from the pulmonary circulation pumps into the
systemic circulation (high pressure circulation).
- Valves and the electrical conduction pathway ensure blood flow is unidirectional.
Circulation
Myocardial cells
- Myocardial cells are electrically linked so depolarisation spreads across the tissue.
- Myocardial cells have a unique, prolonged action potential.
- Myocardial cells generate their own electrical activity using leak channels in the cell
membrane.
- Activation of the sympathetic nervous system opens more channels and increases the
heart rate.
- The ECG allows the movement of electrical activity across the heart to be visualised.
find more resources at oneclass.com
find more resources at oneclass.com
2
Myocardial action potential
Pacemaker potential
Conduction pathway
find more resources at oneclass.com
find more resources at oneclass.com
Document Summary
The right side of the heart receives blood from the systemic circulation and pumps it into the pulmonary circulation (low pressure circulation). The left side of the heart receives blood from the pulmonary circulation pumps into the systemic circulation (high pressure circulation). Valves and the electrical conduction pathway ensure blood flow is unidirectional. Myocardial cells are electrically linked so depolarisation spreads across the tissue. Myocardial cells have a unique, prolonged action potential. Myocardial cells generate their own electrical activity using leak channels in the cell membrane. Activation of the sympathetic nervous system opens more channels and increases the heart rate. The ecg allows the movement of electrical activity across the heart to be visualised. Endothelial cells line blood vessels and prevent clotting. Each type of blood vessel has a specific function and is designed to enable that function to be performed. Hypoxia stimulates the production of new blood vessels.
