If the activation energy required for a chemical reaction were reduced, what would happen to the ra
the rate would increase.
the rate would decrease.
the rate would remain the same.
the rate would go up and down.
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The right answer is The rate would increase.

Explanation:

The velocity constant of a reaction is related with the activation energy by Arrhenius equation. ⇒ k = Ae^-Ea/RT. So as activation energy decreased, the velocity will increase.

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the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.