Muscle Contraction

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

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

Because muscle cells have a charge difference inside and outside the cell, it's said to have _______________.  

• Action Potential
• A positive charge
• membrane potential
• A negative Charge

Inside a muscle cell that is at rest, the internal charge is _______.

• Negative
• Positive
• Neutral

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 Thick filaments?

• Actin
• Myosin
• Myoglobin
• Titan

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

When Sodium ions fly into the muscle cell, it's said to be __________.

• Repolarizing
• Depolarizing
• Electrically neutral
• none of the above

When all of the sodium channels open in the muscle cell, a ________ is created.  

• Negative Charge
• Resting potential
• Muscle relaxtion
• Action Potential