A myosin head binds to which molecule to form a cross bridge?

• Actin

• Myosin

• Troponin

• Tropomyosin

Which muscle tissues pictured are non-striated, involuntarily controlled, and have slow contractions sustained for long periods?

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• 
• 
• 

Which muscle tissues are striated, involuntarily controlled, and have slow, steady contractions except during short periods of activity?

• 
• 
• 
• 

Which of the following muscle tissues is striated, voluntarily controlled, and can contract either slowly or very quickly?

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• 
• 
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Place the microscopic structures of skeletal muscle in order from largest to smallest (left to right).

• Fascicle

• Myofibril

• Muscle

• Myofilaments

• Muscle Fiber

Which of the following membranes covers the whole muscle?

• Epimysium

• Perimysium

• Endomysium

• Submysium

Which of the following membranes covers the fascicle?

• Epimysium

• Perimysium

• Endomysium

• Submysium

Which of the following membranes covers an individual muscle fiber?

• Epimysium

• Perimysium

• Endomysium

• Submysium

The energy required for muscle fibers to contract comes from _______.

Tags

NGSS.HS-LS1-7

Which events occur during stage 1 of the Sliding Filament Theory? (Select 2)

• Calcium ions are released from the sarcoplasmic reticulum
• Nerve impulse reaches the muscle cell and starts the contraction cycle

• ATP splits into ADP & Pi

• New ATP attaches to myosin head causing the myosin head to release from the actin