Biol.2401-04P. Post

What filament prevents contraction?

• Troponin

• Tropomyosin

• Actin

• Myosin

What binds ATP during muscle contraction?

• Myosin

• Actin

• Calcium

• T-tubules

At rest, what muscle protein binds calcium:

• Actin

• Myosin

• Troponin

• None of these

A person with a mutation in actin that prevents myosin binding will have:

• Tetanus

• Uncontrolled muscle contraction

• Lack of muscle tone

• Parkinson's disease

What is Acetylcholine useful for:

• Generation of a sarcolemma action potential

• Activation of calmodulin

• Calcium binding by tropomyosin

• Smooth muscle contraction

What occurs first in contraction of skeletal muscle:

• Sarcolemma action potential

• Myosin-actin crossbridge formation

• Motor neuron action potential

• Calcium binding to troponin

What muscle is involuntary and striated?

• Cardiac

• Skeletal

• Smooth

• All are voluntary

What muscle is involuntary and nonstriated?

• Cardiac

• Skeletal

• Smooth

• All are involuntary

What muscle is voluntary and striated?

• Cardiac

• Skeletal

• Smooth

• All are involuntary

What muscle tires easy and needs rest

• Skeletal

• Cardiac

• Smooth

• All muscles need constant rest