Why can't tetany of the heart occur in normal condition?
A) There are no distinct motor units in the heart.
B) There is inadequate oxygen supply via the coronary circulation to metabolically support a sustained contraction.
C) The refractory period in cardiac muscle lasts almost as long as the duration of the resultant contraction.
D) The heart contracts with maximal force every beat so it is impossible to increase the strength of cardiac contraction.
Correct Answer:
Verified
Q27: What does extrasystole of the heart mean?
A)
Q29: Why is the sinoatrial node the heart's
Q30: What is the function of the atrioventricular
Q33: The electrocardiogram is most useful in determining
Q33: What is the membrane potential of cardiac
Q35: Which of the following ECG waves represents
Q36: What normally carries out the fastest rate
Q37: An ectopic focus is the place where
Q39: What is the normal sequence of the
Q45: On an electrocardiogram, what represents depolarization of
Unlock this Answer For Free Now!
View this answer and more for free by performing one of the following actions
Scan the QR code to install the App and get 2 free unlocks
Unlock quizzes for free by uploading documents