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

Question

Quizplus · Accepted Answer

The normal sequence of signal conduction in the human heart is neural and chemical messengers → SA node → atria → AV node → ventricles. This means that the electrical signal originates in the SA node (cardiac pacemaker) and travels through the atria and AV node before reaching the ventricles, causing them to contract and pump blood out of the heart. This sequence ensures that the atria contract first, followed by the ventricles, allowing for efficient blood flow.

Which of the Following Is the Normal Sequence of Signal