QUESTIONS & ANSWERS
1. What is the main function of the muscular system?
– Answer: It enables the body to move and perform actions like walking, lifting, and digesting food.
2. How many muscles are in the human body?
– Answer: There are more than 600 muscles in the body.
3. What are the three types of muscles?
– Answer:
- 1. Skeletal muscles – Attached to bones (voluntary).
- 2. Smooth muscles – Found in organs (involuntary).
- 3. Cardiac muscle – Only in the heart (involuntary).
4. What is the difference between voluntary and involuntary muscles?
– Answer:
- – Voluntary muscles (e.g., skeletal muscles) can be controlled (like moving your arm).
- – Involuntary muscles (e.g., smooth & cardiac) work automatically (like heartbeat or digestion).
5. How do skeletal muscles help the body move?
– Answer: They are attached to bones by tendons and contract to pull bones, allowing movement (e.g., kicking a ball).
6. Where are smooth muscles found, and what do they do?
– Answer:
- – Digestive system – Help move food.
- – Eyes – Control pupil size in light/dark.
- – They work without you thinking about them.
7. What is special about the cardiac muscle?
– Answer: It is only in the heart, never gets tired, and pumps blood automatically (involuntary).
8. What connects muscles to bones?
– Answer: Tendons (strong fibres) attach skeletal muscles to bones.
9. Why are muscles elastic?
– Answer: They can contract (shorten) and expand (lengthen) to allow movement.
10. Name one voluntary and one involuntary muscle action.
– Answer:
- – Voluntary: Waving your hand.
- – Involuntary: Your heart beating.