3.What do you call the pigment that gives a red color to the blood?
a.hemoglobin
b.keratin
c.melanin
d.cuticle

4. Why leukocytes play an important part in our body?
a.They transport oxygen to the body.
b.They act as soldiers of the body because they fight infections.
c.They help in blood clotting to stop bleeding.
d.They carry nutrients to the different body parts.

5.What would happen to people who have an open wound and whose blood did not clot naturally?
a.They may bleed continuously. b.Their wound will heal fast.
c.They need to take doses of plasma.
d.They need to take doses of platelets.

6.Which of the following is the role of platelet in the body?
a. It fights invading germs and bacteria.
b.It lowers the blood pressure.
c.It helps in blood clotting.
d.It delivers oxygen to the body.

7.Which of the following is a receiving chamber of blood from the veins?
a.auricles
b.ventricles
c.pericardium
d.valves

8.What part of the Central Nervous System transmits the messages to and from the brain?
a.spinal cord
b.neurons
c.medulla oblongata
d.cerebellum

9.Which of the following activities is controlled by the cerebellum?
a.memorizing a prayer
b.adding numbers
c. walking on a balance
beam
d.reading a story

10.Which is NOT controlled by the brain?
a.thinking
c.reflex actions
b.involuntary movements
d.voluntary actions
oment​