Muscle Review

Skeletal Muscle contraction is initiated when the ________ sends a message to the muscle cell.  

• Muscle cell
• Neuron
• Gland
• None of the above

The Ions that are responsible for removing Troponin from Tropomyosin.

• Sodium
• Calcium
• Potassium
• Magnesium

What is the name of the connective tissue covering that covers the entire muscle organ?

• endomysium
• perimysium
• epimysium

What is the name of the thin filaments in the muscle cell?

• Actin
• Myosin
• Myoglobin
• Titan

What is the structure that stores the Calcium in the muscle cell.  

• Sarcoplasm
• Sarcolemma
• Sarcoplasmic Reticulum
• Myoglobin

What is the name of the contractile unit in a muscle cell?

• fascicle
• sarcomere
• tendon
• endomysium

What is the connective tissue covering of a muscle fascicle?

• endomysium
• perimysium
• epimysium

The neurotransmitter that signals muscle contraction is called...

• Ach
• Myosin
• Actin
• Calcium

Calcium:

• causes ATP binding to actin
• increases the action potential along the sarcolemma
• binds to proteins on myosin
• triggers the binding of myosin to actin

When a muscle fiber contracts, the I bands diminish in size.

• True
• False