26. Which of the following is a skeletal muscle?
A. muscle of the diaphragm
B. muscle of the lungs
C. muscle of the stomach
D. muscle of the thigh
27. How does a muscle pull a bone?
A. the muscle expands B. the muscle contracts
C. the muscle twist D. the muscle flattens out
28. Which of these organs has a muscles?
A. arms
B. esophagus
C. heart
D. stomach
29. What happens to the muscles when they are not often used?
A. they become tone
B. they become strong
C. they become weak D. they become big
30. Which type of muscle is involve in the beating of the heart?
A. cardiac muscles
B. smooth muscles
C. skeletal muscles
D. all muscles
31. Which activity is made possible by smooth muscles?
A. blinking
B. digesting
D. writing
C. running
32. Which of the following is the function of the hairs in the nose and ears?
A. reduces the skin's exposure to UV rays
B. filter dust particles
C. Protects the head and skull from abrasion
D. Helps in sensations like touch, pain, heat & pressure





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