Which of the following is the normal sequence of signal conduction in the human heart?
A) neural and chemical messengers -AV node -atria -SA node -ventricles
B) neural but not chemical messengers -AV node -ventricles -SA node - atria
C) neural and chemical messengers -ventricles -SA node -atria -AV node
D) neural and chemical messengers -SA node -atria -AV node -ventricles
E) chemical but not neural messengers -atria -SA node -ventricles -AV node

Question

Quizplus · Accepted Answer

The normal sequence for signal conduction in the human heart is initiated by the SA (sinoatrial) node, which is responsible for generating electrical impulses. These impulses travel from the SA node to the atria, causing them to contract. The impulses then pass through the AV (atrioventricular) node, which acts as a gatekeeper, delaying the impulses before allowing them to pass to the ventricles. Finally, the impulses reach the ventricles and cause them to contract, completing the heartbeat cycle. This sequence is represented by option D - neural and chemical messengers -SA node -atria -AV node -ventricles.

Which of the Following Is the Normal Sequence of Signal