Question

1. What are the basic actions of muscle to make all movements possible?
A. Rotate clockwise and counter clockwise
B. Contract and relax
C. swell and shrink
D. Move up and down

2. What happens to the lungs when the diaphragm contracts?
A. Shorten
B. Expand
C. Contracts
D. Lengthen

3. What do inflamed lymph nodes means?
A the lungs are about to expand
B. Urination should be done immediately
C. The intestines have completely digested the food
D.there might be many harmful organism inside the body

4. When bones and muscle cooperate, what do they eneble u to do?
A. Clean Blood
B.Expel waste
C. move
D. digest food

Answer 1

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1. B. Contract and relax
2. B. Expand
3. D. There might be many harmful organism inside the body
4. C. move

Answer 2

1. The basic actions of muscles to make all movements possible are (B). Contract and relax.

2. When the diaphragm contracts, lungs starts to (B). Expand

3. Inflamed lymph nodes means (D). There might be many harmful organism inside the body

4. Bones and muscles cooperate to enable us to (C). move

Explanation:

• Muscle contraction and relaxation are the basic actions of muscles to make movements. Contraction happens due to nerve stimulus and relaxation happens when there is no nerve stimulus.
• Diaphragm contracts during inhalation. Due to its contraction the chest cavity expands and as a result lungs expand.
• Lymph nodes produce antibodies to fight against antigens(bacteria, virus). Inflammation(swollen) of lymph nodes are due to infections from antigens like viruses.
• The skeletal system and the muscular system are together responsible for locomotion(movement) of a living organism. Thus movement happens due to the cooperation between bones and muscles.