21. Which of the following downward extension of the brain and controls our reflex actions?
A. Nerve cells
B. Spinal cord
C. Brain
D. Medulla oblongata

22. WHY IS THE NERVOUS SYSTEM THE MOST IMPORTANT SYSTEM IN OUR BODY?
A. THE NERVOUS SYSTEM CONTROLS ALL THE ACTIVITIES OF THE BODY

B. THE NERVOUS SYSTEM MAKES US HAPPY

C. THE NERVOUS SYSTEM HELPS US TO SEE, FEEL, TOUCH,TASTE AND SMELL THINGS

D. THE NERVOUS SYSTEM CONSIST OF NERVES ALL OVER THE BODY
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