Cardiac conduction Flashcards
Factors of Haemoglobin?
Low affinity for oxygen
Found in blood (Red blood cells)
Factors of Myglobin
High affinity for oxygen
Found in muscles
Fitness benefit of regular participation in low intensity continuous training?
Increased Aerobic endurance
Which way does the oxyhemoglobin disassociation curve go during Bohr Shift.
to the right
Due to Haemoglobin’s decreased affinity for Oxygen
Two factors causing Bohr Shift?
Increase in Carbon Dioxide
Increase in Temperature
What does Starling’s law state
Increased Venous return leading to increased stroke volume
Two functions of fast component of EPOC
Restore Phosphocreatine
Break down lactic acid
What is the order of the Cardiac conduction system?
Atrioventricular node, Sinoatrial Node, Bundle of HIS, Purkinje fibres
What is the receptor responsible for a change in blood pressure?
Baroreceptor
Define A-VO2 diff?
The diff between oxygen content of arterial and venous blood.
Where is the 0.1 second delay located and why?
At the Atrioventricular node to allow the Atria to contact (pumping blood into ventricles)
What is the sinoatrial node?
small mass of specialised fibres found in the right atrium which initiates the heartbeat
What is atrial systole?
the contraction phase of the atria
What is the atrioventricular node?
small mass of fibres found in the atrioventricular septum that electrically connects the right atrium and right ventricle
What is the bundle of HIS?
specialised bundle of nerve tissue located in the septum which passes the electrical impulse through the septum
