sliding filament theory of muscle contraction

Which molecules are necessary for successful muscle contraction? pick 2

• Calcium

• Phosphorus

• ATP

• Glucose

myosin protein

• sarcolemma
• sarcoplasmic reticulum
• thick filament
• thin filament

Which filament slides inward during muscle contraction

• Actin

• Myosin

This ion is responsible for electrical stimulation of muscle fiber

• Calcium

• Sodium

• Potassium

• Magnesium

The energy needed to perform a muscle contraction comes directly from

• ATP

• Oxygen

• Glucose

• Calcium

Identify the structure. It binds to thin filamentous actin, and uses ATP hydrolysis to generate force and "walk" along the thin filament.

• actin

• myosin head

• tropomyosin

• troponin

• cross bridge