Nervous Control Of The Cardiac Cycle Cardiovascular System L4 Flashcards
(6 cards)
1
Q
Sa node
A
Generates a nerve impulse across atria to make them contact
2
Q
Av node
A
Delays transmissions of the nerve impulse so the atria can empty
3
Q
Bundle of his
A
Transmits the impulse from the atria into the ventricles
4
Q
Purkinje fibres
A
When the impulse reaches the pf the ventricles contract - pumping blood out of the heart through the aorta and pulmonary artery.
5
Q
Sympathetic nervous system
A
This prepares the body for exercise and is responsible for increasing heart rate.
Impulse sent through sa nose faster impulses are then fired out increasing heart rate.
6
Q
The parasympathetic nervous system
A
Responsible for slowing our heart rate down.
Impulse sent through parasympathetic vegas nerve to slow the sa node and decrease heart rate
Used for rest and recovery
