36. What is the plasma component of blood primarily composed of? A)Water B Erythrocytes C)Platelets D) White blood cells 37. What is the primary function of erythrocytes? A) Coordinate the immune response B) Initiate clotting C) Transport oxygen D) Fight infections 38. Which chamber of the heart pumps oxygenated blood to the body? A) Right atrium B) Left atrium C) Right ventricle D) Left ventricle 39. Which factors are effective in lowering blood pressure? A) Hormones that dilate blood vessels B) Hormones that constrict blood vessels C) Increased heart rate D) Increased blood production 40. Which ventricle pumps oxygenated blood into the aorta during a heart contraction? A) Right ventricle B) Left ventricle THE END!

36. A) Water<br />The plasma component of blood is primarily composed of water, which makes up about 90-92% of plasma. The remaining components include electrolytes, proteins, glucose, hormones, carbon dioxide, and other dissolved substances.<br /><br />37. C) Transport oxygen<br />The primary function of erythrocytes, or red blood cells, is to transport oxygen from the lungs to the tissues and organs of the body. They contain hemoglobin, a protein that binds to oxygen and facilitates its transport.<br /><br />38. D) Left ventricle<br />The left ventricle of the heart pumps oxygenated blood to the body. It receives oxygen-rich blood from the left atrium and then pumps it out through the aorta, the largest artery in the body, to be distributed to the tissues and organs.<br /><br />39. A) Hormones that dilate blood vessels<br />Hormones that dilate blood vessels, such as nitric oxide and certain prostaglandins, can be effective in lowering blood pressure. Dilation of blood vessels increases their diameter, which reduces the resistance to blood flow and leads to a decrease in blood pressure.<br /><br />40. B) Left ventricle<br />The left ventricle pumps oxygenated blood into the aorta during a heart contraction. The aorta then carries the oxygen-rich blood to the systemic circulation, delivering it to the tissues and organs of the body.