What is something that makes the action potential in a cardiac muscle cell diffe
ID: 34253 • Letter: W
Question
What is something that makes the action potential in a cardiac muscle cell different from the action potential in a skeletal muscle cell?
A. It has a plateau phase caused by an influx of Calcium ions
B. It has a depolarization phase caused by an influx of Sodium ions
C. It has a repolarization phase caused by an efflux of Potassium ions
D. It has an absolute refractory period
E. It has a relative refractory period
In the fetal heart, the _________ is an opening in the interatrial septum between the left and right atria.
A. Foramen Ovale
B. Fossa Ovalis
C. Ductus Arteriosis
D. Ligamentum Arteriosum
True or False: Both atrioventricular valves open and shut and the same time.
A. True
B. False
Put the structures of the heart's conducting system in order, starting from the structure that normally initiates the electrical signal. (Remember to put "<" signs between items.)
Is this correct?
Internodal Pathways < Sinoatrial (SA) Node < Atrioventricular (AV) Node < Atrioventricular (AV) Bundle < Bundle Branches < Purkinje Fibers
Explanation / Answer
ANSWER -1 A. It has a plateau phase caused by an influx of Calcium ions
ANSWER -2 A. Foramen Ovale
ANSWER 3- A. True
ANSWER 4- No Not Correct , Correct is as follows :
Sinoatrial (SA) Node -> Internodal Pathways-> Atrioventricular (AV) Node ->
Atrioventricular (AV) Bundle->Bundle Branches ->Purkinje Fibers
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