What is the name of the thin filament that plays a role in muscle contraction?

When muscles contract they:

True or False. Muscles help maintain constant body temperature.

What is the layer of fibrous tissue that separates muscles from each other and from the skin.

What is the name of the specialized plasma membrane of the muscle?

Which of the following are NOT bands of the myofibril? Check all that apply.

What is the contractile unit of a muscle fiber called?

___________ filaments have heads that can grab onto _________ forming a crossbridge.

True or False. Muscles must be stimulated by a nerve (motor neuron) to contract.

What is the name of the neurotransmitter that is released to transmit a nerve impulse to muscle?

What ion is released to start muscle contractions?

The sliding filament theory states that a muscle contracts when the _____________ filament in the muscle fiber slides over the _____________ filament.

What exposes the binding sites on actin so that myosin can attach?

The distance between the Z lines _______________, when muscles contract.

The myosin heads get ready to bond to actin using __________ energy.

Bonds of ATP are ___________ to release energy.

Attachment to a moveable bone is the ________________ point

Attachment to a immoveable bone is the ________________ point

When you flex you _______________ the angle of the joints that bring two bones closer together, and when you extend you ________________ the angle of the joint.

The muscle that does most of the work is known as the: