The diagram above shows the neural structures that
control and coordinate the beating of the heart. How
would the cardiac cycle be affected if neural signals
were blocked within the Purkinje fibers?

- The atria would contract first, followed by the ventricles.
- The atria and ventricles would contract at the same time.
- Only the left atrium would contract.
- The ventricles would not contract.

since there are no options posted i'll give you a few examples.

a dolphin's flipper, bird's wing, cat's leg.

evidence and logical support is essential for a scientist to do in order to maintain credibility. this is because no one can believe without any logic and without any evidence.hence a scientist can maintain credibility by proving himself and by answering logically so experiments prove very beneficial. logical hypothesis give conclusion which is acceptable. therefore, there are two main factors to maintain credibility by a scientist is evidence and logical support.