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Home Q & A Board Biology-Related Homework Help General Biology
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lisa_lordes lisa_lordes
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7 years ago
Heart block is a condition in which the SA node is properly functioning but the atria and ventricles are contracting out of synch. Which of the following statements explains why this happens?
A) The coronary arteries are not delivering blood to the heart.
B) The AV node is not sending signals to the ventricles as it should.
C) The heart valves are allowing blood to flow backward through the heart.
D) The SA node is working extra hard to make the ventricles catch up.
Textbook 
Biology of Humans: Concepts, Applications, and Issues

Biology of Humans: Concepts, Applications, and Issues


Edition: 5th
Authors:
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PoalaPoala
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7 years ago
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3 years ago
okay then
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