POP QUIZ #8

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

Calcium's purpose in muscle contraction is to

• cross the neuromuscular junction and stimulate the sarcolemma

• travel down the T-tubule to reach interior myofibrils

• bind to troponin, move tropomyosin, and expose actin's binding sites

• attach to actin, forming a crossbridge

Muscle contraction is stimulated when this specific neurotransmitter is released into the synaptic cleft. What is the name of this neurotransmitter?

• Neurotensin

• Acetylcholine

• Cholecystokinin

• Norepinephrine

A synapse between a motor neuron and a muscle fiber that it regulates.

• Synaptic cleft

• Motor end plate

• Neuromuscular junction

• Synaptic vesicle

____________ attaches to actin to form the cross bridge.

• Troponin

• Tropomyosin

• Myosin

• Calcium

Muscle Fiber Membrane

• Sarcolemma

• Sarcoplasm

• Sarcoplasmic Reticulum

separates and surrounds fascicles

• EPIMYSIUM

• PERIMYSIUM

• ENDOMYSIUM

Bundle of Muscle Fibers is called?

• Fascicles

• Fascia

• Myofibril

Process of cellular respiration takes place within this organelle which provides energy to your muscle cells

• Cytoplasm

• Sarcolemma

• Mitochondria

• Endoplasmic Reticulum

the region between two z-lines is called

• sarcolemma

• myofibrils

• sarcoplasm

• sarcomeres