Muscle Physiology Review

Which protein does calcium attach to preceding muscle contraction?

• Actin

• Myosin

• Troponin

• Tropomyosin

Click all that apply. Which of these make up a motor unit?

• Motor neuron

• Muscle fiber

• Muscle

• Nerve

Muscle fibers that are most prevalent in postural muscle

• slow oxidative fibers

• fast oxidative fibers

• glycolytic fibers

• anaerobic

The arrival of the action potential in the axon terminal causes the opening of

• voltage gated calcium channels

• ligand gated calcium channels

• ligand gated sodium channels

• voltage gated sodium channels

Which muscle characteristic allows the muscle to return to resting length after contraction?

• Contractility

• Excitability

• Extensibility

• Elasticity

What is the name of the plasma membrane surrounding each muscle fiber?

• T Tubule

• Sarcolemma

• Sarcoplasm

• Nucleus

What is the contractile unit of the muscle?

• Z disk

• Sarcomere

• Muscle fiber

• Muscle cell

What protein makes up the thick filaments?

• Troponin

• Tropomyosin

• Myosin

• Actin

What part of the muscle fiber stores Ca ions and releases them when stimulated?

• T tubule

• Sarcolemma

• Nucleus

• Sarcoplasmic reticulum

Tags

NGSS.MS-LS1-2

What is the name of the location where the neuron and muscle fiber meet?

• Sarcoplasm

• Sacolemma

• Neuromuscular junction

• Axon terminal