The main responsible for the delay among the atrial and
ventricular contractions is the action potential conduction velocity of the AV
node cells. If the atria and ventricles contract simultaneously, atria cannot
give any help in filling the ventricles, which is needed, especially in those
with stiff ventricles as in the elderly. Hence atria have to contract first and
then the ventricles.
Answer:
The phases of the Moon depend on its position in relation to the Sun and Earth. As the Moon makes its way around the Earth, we see the bright parts of the Moon's surface at different angles.
Explanation:
The function of the cell membrane is to protect the cell from any outer surroundings that could be harmful to it.
All neurons have a cell body called the soma. The nucleus of all neurons are found inside of the soma. The soma sends information to other neurons.
AnswerA. ADP and P form ATP
Explanation:
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