1.	Which of these does not cause an increase in pulse rate?
	Exercise   Anxiety   Fever   Sleep
Hint Dica
2.	Due to presence of ______ , back flow of blood is prevented in veins.
	All of these   Thick walls   Valves   Septa
3.	Very fine vessels called capillaries connect arteries and veins to each other.
	True   False
4.	Which of these is not a feature of veins?
	They return blood from the various parts of the body to the heart.   They contain valves.   They are thin-walled.   All veins carry deoxygenated blood.
Dica
5.	Deficiency of hemoglobin is known as anemia.
	True   False