The correct answer is this one: "Four are eukaryotes, and two are prokaryotes." The six kingdoms are composed of four are eukaryotes, and two are prokaryotes. The eukaryotes are the Plantae, Animalia, Protista and Fungi. The prokaryotes includes the Eubateria and Archae.
The correct answer is active hyperemia.
Active hyperemia represents the increase in organ blood flow (hyperemia) that is associated with the increased metabolic activity of that organ. In this case, the increase in blood flow accompanies muscle contraction during the exercise. Muscle contraction stimulates the production of vasoactive (vasodilative) substances that dilate the vessels and thus, bring more oxygen to the muscles.
