Fish heart myogenesis Flashcards
1
Q
Fish hearts are what kind of muscle?
A
- cardiac myocyte
2
Q
What does myogenic mean?
A
- heart rate originates within heart
3
Q
What does autorhythmic mean?
A
- make own beat patterns
4
Q
What initiates electrical signal in the fish heart?
A
- islets of pacemaker cells in sinoatrial region
5
Q
What does it mean for myocytes to be electrically coupled? What does this cause?
A
- if one gets excited, wave of neighbors get excited
- wave of contraction
6
Q
What does the atrio-ventricular delay allow for?
A
- atria to completely empty into ventricle
7
Q
What do fish hearts lack?
A
- conducting fibres
8
Q
Instead of conducting fibres, what do fish hearts have?
A
- have wave of contraction from source pacemaker cells
9
Q
A
