Muscle Physiology Quiz

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

• Sarcoplasm

• Sacolemma

• Neuromuscular junction

• Axon terminal

What is the name of the neurotransmitter that is released from the neuron to the sarcolemma?

• Acetylcholine

• Acetone

• ATP

• Calcium

Which of these occurs first during a muscle contraction?

• The nerve signal reaches the neuromuscular junction

• Ach is released and opens Na ion channels

• The sarcomere shortens

• The myosin binds to the actin

Z represents

• Dendrite
• Axon Terminal
• Neurotransmitters
• Synapse

Which of the following is NOT a muscle function?

• Movement of skeleton
• Heat generation
• Transport substances around body
• Moves neurons around body

What is the name of the protein myofilament that pulls the actin towards the center of the Sarcomere?

• Fascicle
• Actin
• Myosin
• Titin

Which of the following is the name given to the connective tissue that covers of a muscle fascicle or bundle of muscle?

• Endomysium
• Perimysium
• Epimysium
• Myofilament

What two chemicals are necessary for muscle contraction to occur?

• Niacin and Potassium
• Calcium and ATP
• Sodium and Potassium
• Ach and Potassium