3.5 Flashcards
1
Q
What are the key components of the conduction system of the heart?
A
- SA/AV nodes
- Bundle of His (left and right bundle branches)
- Purkinje fibres
2
Q
Where is the SA node?
A
Right atrium, near entry point of superior vena cava
3
Q
Where is teh AV node
A
Right atrium, just above fibrous tissue ring that separates atria from ventricles (hence AV)
4
Q
Describe cardiac action potential generation
A
- Slow entry of Na+
- Transient Ca2+ channels open
- L-type calcium receptors open
- AP
- K+ release
5
Q
Is the same mechanism used for cardiomyocyte contraction as SA action potential generation
A
Nope. Myofilaments need more calcium influx
6
Q
By what factor does cardiac output increase during exercise?
A
4-6 fold
7
Q
What are the four key aspects of sexual consent?
A
- Competence
- Informed
- Ongoing
- Enthusiastic
