02/03 Flashcards
What are cardiac cells called?
Cardiac myocytes
What are the two categories of myocytes?
- Pacemakers
2. Contractile
What are contractile cells?
Muscle cells that actually contract
What are pacemaker cells?
Cells that spontaneously depolarize + are responsible for generating signals and telling contractile cells to contract
The Sinoatrial Node is found where?
On the posterior and superior of the heart
What happens when the sinoatrial node generates AP?
The AP travels through the right atrium and then over to the left atrium
How do the intercalated disks assist with the AP traveling from the sinoatrial node?
They allow for it to travel super fast
After reaching the left atrium, where does the AP go?
It pauses and then travels down the ventricles
What happens after the AP travels down Bundle of His?
It branches into Purkinje Fibers
What happens once AP is finished with conduction network?
The contractile cells are then told to contract
When AP travels through Atria, the cells of the Atria do not communicate with cells in the ventricle due to
The fibrous skeleton
SA node, AV node, and branches are what kind of cells?
Pacemaker cells
The medulla has a cardiac center which contains
Both cardioinhibitory and cardioacceleratory factors
Both cardiac and skeletal muscle is similar in the sense that
They need AP for contraction
How do cardiac cells contract?
In a single unit
