Anatomy 9b Muscle Contractions

Which 2 of the following are the regulatory proteins in muscle contraction? (Multiple answer)

• Sarcoplasmic reticulum

• Actin

• Troponin

• Myosin

• Tropomyosin

Ca2+ released by sarcoplasmic reticulum will bind to

• Actin

• Troponin

• Myosin

• Tropomyosin

Which of the following refers to the muscle cell?

• Myofibril

• Myofilament

• Fascicle

• Muscle fiber

__________ is attached to the Z line?

• myosin

• actin

• thick filament

• troponin

What is the contractile unit formed from Z line to Z line?

• Sarcomere

• T Tubule

• Sarcoplasmic reticulum

• Fascicle

____________ attaches to actin to form the cross bridge.

• Troponin

• Tropomyosin

• Myosin

• Calcium

What does calcium attach to in order to allow a a muscle contraction?

• Myosin

• Tropomyosin

• Troponin

• Actin

What is released from the sarcoplasmic reticulum?

• Inorganic phosphate

• ADP

• Calcium

• ATP

What is the name of the neurotransmitter released at a neuromuscular junction?

• Calcium

• Acetylcholine

• Dopamine

• Troponin

A mitochondria's role in muscle contraction is the production of...

• Synthesis of ATP
• Metabolism of ATP
• Synthesis of Proteins
• Metabolism of Worn out Proteins

Tags

NGSS.HS-LS1-7