Muscle contractions

The all-or-none response means

• all of the muscles in a region contract together

• all of the muscle fibers within a muscle contract together

• when a muscle fiber contracts, it contracts completely

• when a muscle fiber contracts, all of its ATP is changed to ADP

What two chemicals are necessary for muscle contraction to occur?

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

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

• Sarcoplasm
• Sarcolemma
• Sarcoplasmic Reticulum
• Myoglobin

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 Thick filaments?

• Actin
• Myosin
• Myoglobin
• Titan

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

• Actin
• Myosin
• Myoglobin
• Titan

Movement is enabled by muscle

• contraction
• atrophy
• subduction
• torpor

The ability shorten in response to a stimulus 

• contractility
• irritability
• volatility
• agility

The gap between the nerve endings and the muscle cells is the 

• synaptic cleft
• synaptic cliff
• sympathetic nerve
• axon

The mechanism of muscle contraction.

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