Muscle Contraction and Muscle Names

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

A sarcomere is labeled here as _______.

• BD

• BC

• AE

• AB

The Z line is labeled here as _______.

• BD

• AC

• AE

• AB

Which is more true to cause muscle contraction?

• Actin Pulls on the myosin
• Myosin Pulls on the Titin
• Myosin Pulls on Actin
• Actin Pulls on Titin

Another name for the prime mover is

• antagonist

• agonist

• synergist

• fixator

A muscle that helps the agonist is called a

• antagonist

• agonist

• synergist

• fixator

Which of the following refers to the muscle cell?

• Myofibril

• Myofilament

• Fascicle

• Muscle fiber

What is the name of the place where a nerve meets a muscle fiber

• Nerve junction

• Neuromuscular junction

• Muscle junction

• Crossbridge

Neurons communicate with the muscle fiber by way of chemicals called _______.

• Synaptic cleft

• Neurotransmitters

• Neuromuscular junction

• Synapse