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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I believe the answer is: IT OVERTUNED THE "SEPARATE BUT EQUAL" DOCTRINE.
In brown v. Board of education, the court ruled that separating black and white students in schools are deemed as an unconstitutional practice.
This become a landmark that overturned the separate but equal doctrine in other places such as public transportation, restaurants, public restrooms, etc.
Answer:
Young people should also vote so that the government can have their opinions in electing the next leader of the country
Explanation:
Young people should vote because there would be a higher chance for different candidates to win and also there would be a more diverse political spectrum.
An evolutionary psychologist would suggest that the function of tradition such as wearing green on saint Patrick day is to enhance the sense of group membership. In addition, the practice, values and goals united by sets of people is raised to as culture and associated with hunter gatherer societies, the agricultural societies are more patriarchal. As societies became larger, humans devised new cultural systems to preserve group cohesion.
Ethics need to be considered when <span>designing, conducting, and reviewing s</span><span>cientific research.
they need to do this because The scientific communities often found some occasions when a scientist is willing to manipulate a research data in order to change the research narrative, which could compromise the science advancement and endanger the whole population</span>
