Answer:
nonegalitarain
Explanation: hope this helps
Sinoatrial node part of the autonomic nervous system adjusts the heart rate and the arteriole diameter to regulate blood pressure through negative feedback
The SA (sinoatrial) node is generates an electrical signal that can causes the upper heart of the chambers (atria) to contract. The signal and then passes through the AV (atrioventricular) node to the lower of the heart chambers (ventricles), causing them to contract, or to pump. The SA node is considered the pacemaker of heart.
The sinus node continuously generates electrical impulses, thereby setting the normal rhythm and also rate in a healthy heart. Hence, the SA node is also referred to as the natural pacemaker of the heart
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Answer:
The social sciences are subjects concerned with how humans interact with the world and sociology is most closely related to this social science in the study of human behavior
Explanation:
Immediately south of the United States is the continent of South America. Africa also lies mostly south of the United States although in the different hemisphere. The same holds for Australia, it is more southern than the United States but not immediately southern of it.
