1. A portal vein begins in the form of capillaries and ends in the form of capillaries too.   True   False   2. The aorta originates from the _______ of the heart.   left ventricle   left auricle   right ventricle   right auricle   Hint Half-n-half Clue   3. Pericardium is the double-walled membranous covering that protects the heart.   True   False   4. The pulse rate decreases during strenuous physical work.   True   False   5. The coronary arteries originate from the base of the aorta.   True   False   6. The word 'pulse' is related to veins.   True   False   7. Blood pressure is exerted by the blood flowing through the veins on the walls of the veins.   True   False