PTNE Skeletal Muscle Contraction

What name is given to a section of muscle between the Z-Lines?

• Sarcoplasm

• Mitochondria

• Cytoplasm

• Sarcomere

Which Myofilament is considered the thin one?

• Actin

• Myosin

• Myofibirils

• Mitochondria

Which energy compound is required for muscle contraction?

• ATP

• ADP

• AMP

• GPP

Which of the following is NOT a part of the anatomy used to identify where the motor neuron meets skeletal muscle?

• Axon Terminal

• Synaptic Bulb

• Neuromuscular Junction

• Action Potential

What is the neurotransmitter released from the synaptic bulb for an action potential to begin

• Serotonin

• Dopamine

• Aceytlcholine

• ATP

Where is calcium (Ca+2) released from in skeletal muscle?

• Sarcoplasm

• Cytoplasm

• Sarcoplasmic Reticulum

• Mitochondria

What does Calcium bind to in order for myosin crossbridges to form?

• Actin

• Troponin

• Tropomyosin

• Myosin

Binding sites are exposed on actin filaments when this structure moves out of the way

• Tropomyosin

• Troponin

• Myosin

• ATP

When Myosin and Actin bind, what is the name given to a contraction phase

• Eccentric

• Isometric

• Power Stroke

• Binding

The first step of muscle contraction starts with what...

• ATP re-synthesis

• Nerve Impulse

• Action potential

• ATP-PC system