Muscle Contraction Quiz

What are the three types of muscle tissue?

• Smooth, cardiac, and skeletal

• Cardiac, skeletal, and connective

• Smooth, skeletal, and connective

• Smooth, cardiac, and connective

Which type of muscle tissue is found in the walls of hollow visceral organs?

• Connective muscle tissue

• Smooth muscle tissue

• Cardiac muscle tissue

• Skeletal muscle tissue

What is the specialized name for the endoplasmic reticulum in muscle cells?

• Smooth reticulum

• Mitochondrial reticulum

• Sarcoplasmic reticulum

• Cardiac reticulum

What is the function of troponin and tropomyosin in muscle contraction?

• They provide energy for muscle contraction

• They regulate the release of ATP in muscle cells

• They bind with calcium to allow actin and myosin to interact

• They block actin from binding with myosin

What neurotransmitter initiates an action potential in muscle after being released from the motor neuron?

• Ca++

• acetylcholinesterase

• acetylcholine

• myosin

What is the role of ATP in muscle contraction?

• It provides energy for myosin to bind with actin

• It releases calcium from the sarcoplasmic reticulum

• It breaks down into ADP and phosphate to release stored energy

• It binds with troponin to unblock actin

What is the structure that separates sarcomeres in a muscle fiber?

• Myofibril

• Z line

• Sarcoplasmic reticulum

• T-tubule

Which type of muscle tissue is voluntary and attached to the skeleton?

• Connective muscle tissue

• Cardiac muscle tissue

• Smooth muscle tissue

• Skeletal muscle tissue

What are the names of the two myofibrils found in a muscle cell?

• myosin and actin

• sarcolemma and sarcomere

• troponin and tropomyosin

• centrosomes and centromeres