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# 1
pilihan
What is the Sliding Filament Theory about?
- Cooking
- Muscle movement
- Weather patterns
- Plant growth
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# 2
pilihan
Which two proteins are mainly involved in the Sliding Filament Theory?
- Actin and Myosin
- Keratin and Collagen
- Hemoglobin and Insulin
- Gluten and Lactose
# 3
pilihan
In the Sliding Filament Theory, what happens to the muscle when it contracts?
- It gets longer
- It stays the same
- It gets shorter
- It disappears
# 4
pilihan
Which part of the body uses the Sliding Filament Theory?
- Brain
- Bones
- Muscles
- Heart only
# 5
pilihan
What happens to the actin and myosin filaments during muscle contraction?
- They break apart
- They disappear
- They slide past each other
- They stay still
# 6
pilihan
What is the role of myosin in muscle contraction?
- To relax muscles
- To make muscles grow
- To pull on actin
- To produce energy
# 7
pilihan
When muscles relax, what happens to the actin and myosin filaments?
- They disappear
- They slide apart
- They harden
- They become shorter
# 8
pilihan
Why is energy important in the Sliding Filament Theory?
- It keeps us awake
- It powers muscle contraction
- It makes muscles grow
- It is not needed
# 9
pilihan
What would happen if actin and myosin could not slide past each other?
- Muscles would be too strong
- Muscles could not contract
- Muscles would grow faster
- Muscles would disappear
# 10
pilihan
In the Sliding Filament Theory, what happens to the sarcomere during muscle contraction?
- It lengthens
- It shortens
- It stays the same
- It twists
# 11
pilihan
Which ion is crucial for initiating the muscle contraction process?
- Sodium
- Calcium
- Potassium
- Chloride
# 12
pilihan
What is the role of myosin in muscle contraction?
- It binds to calcium
- It forms cross-bridges with actin
- It inhibits actin
- It provides structural support
# 13
pilihan
What is the name of the structure formed by actin and myosin filaments overlapping?
- Cross-bridge
- Z-line
- A-band
- I-band
# 14
pilihan
Which of these bands remains unchanged during muscle contraction?
- H-zone
- A-band
- I-band
- Z-line
# 15
pilihan
What is the function of tropomyosin in the muscle contraction process?
- Activates myosin
- Blocks myosin binding sites on actin
- Releases calcium
- Converts ATP to ADP
# 16
pilihan
What happens to the H-zone as the muscle fully contracts?
- It becomes larger
- It becomes smaller
- It stays the same
- It disappears
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