Douglass delivered a speech at a ceremony to commemorate the signing of the Declaration of Independence, held at Rochester's Corinthian Hall. It was a play on words, when the speaker told the audience, "This July 4th is yours, not mine."
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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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A. Parliament passed the Tea Act of 1773 to save the British East India Companyfrom going under. This act gave the East India Company a favorable advantage over colonial merchants because it was able to ship its extra tea to the colonies without paying most of the tea taxes.
