What two proteins are needed for muscle contraction in the human body?

• tropin & tropymosin

• actin $ Calcium

• actin & myosin

• ATP & Calcium

What do we call the simplest part of a muscle that is made up of tiny, parallel threads called?

• sarcomere

• myofibril

• perimysium

• Epimysium

Your muscle fibers form large, string like bundles called?

• Epimysium

• perimysium

• Myofibril

• Fascicles

What are the two components that are needed to begin contraction?

• Acytelcholine and Actin

• Acytelcholine and myosin

• ATP and Calcium ions

• ATP and Sodium ions

Where are the actin and myosin filaments in every one of your muscle fibers located?

• endomysium

• perimysium

• Epimysium

• Sarcomere

Name what this is in your mucles?

• sarcomere

• sarcoplasmic reticulum

• mitochondria

• tublules

What is the very first thing that needs to occur for a muscle contraction?

• actin

• myosin

• Calcium

• Action Potential by a motor neuron.

Which of the following list of words would include the function of muscles?

• movement, heat production, posture, contractility

• movement, heat production, posture, excitability, contractility, extensiblity, elasticity

• movement, blood formation, heat production

• none of the above

What do you call the muscle attachment, where the muscle does not move when it contracts?

• attachment

• insertion

• origin

• none of the above

What type of muscle tissue is this?

• cardiac

• smooth

• skeletal

• all the above