PRACTICAL EXAM I: FROG HEART
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what are the main differences between a human heart and a frog heart?
- Frog heart
- - sinus venosus (pacemaker)
- - one ventricle
- human heart
- - sinoatrial node (pacemaker)
- - two ventricles
how does the oxygenated and deoxygenated blood stay separate in the frogs heart?
since there is only one ventricle there has to be a trabeculae inside of it in order to help separate the oxygnated and deoxygenated blood
the frog hears continues to beat in what state for several hours?
in a situ state
what specialized tissue is the heart made up of?
all cardiac muscle cells have the inherent ability to do what?
to depolarize and repolarize
action potentials travels through cardiac muscles via what?
via gap junctions that allow ions to move
the heart rate is determined by what?
the pacemaker cells that undergo the fastest depolarization/repolarization cycle
where else can pacemaker cells be found in the human heart?
they can also be found in the AV node
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