1. Very fine vessels called capillaries connect arteries and veins to each other.   True   False   2. Which of these does not cause an increase in pulse rate?   Anxiety   Sleep   Fever   Exercise   Hint Hint       3. Contraction of ventricles is known as diastole.   True   False   4. Deficiency of hemoglobin is known as anemia.   True   False   5. This statement is not true :   Pulmonary veins carry oxygenated blood.   Left side of the heart contains oxygenated blood.   Right ventricle pumps blood to various parts of the body.   Valves are present between auricles and ventricles to prevent backflow of blood.   Hint       6. Bleeding time is prolonged in hemophilia.   True   False   7. Due to presence of _______ , back flow of blood is prevented in veins.   Valves   Septa   Arteries   Thick walls   Half-n-half Clue