HBS 4.2 - Muscle Contraction

What is the name of the Thick filaments?

• Actin
• Myosin
• Myoglobin
• Titan

What two chemicals are necessary for muscle contraction to occur?

• Niacin and Potassium
• Calcium and ATP
• Sodium and Potassium
• Ach and Potassium

___ and ___ are regulatory proteins bound to actin. 

• Troponin and tropomyosin
• Myosin and actin
• Calcium and Oxygen
• Glycogen and hemoglobin

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

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

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

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

The neurotransmitter that signals muscle contraction is called...

• Acetylcholine
• Myosin
• Actin
• Calcium

The mechanism of muscle contraction.

• sarcoplasmic reticulum
• fasciitis
• sliding filament mechanism
• muscle cramps

Region where a motor neuron comes in close contact with a muscle cell.

• neurotransmitter
• muscular dystrophy
• muscle tension
• neuromuscular junction