Muscular Tissue Quiz

What are the three types of muscular tissue?

• Skeletal, cardiac, and smooth

• Voluntary, involuntary, and cardiac

• Striated, non-striated, and cardiac

• Elastic, contractile, and extensible

Which characteristic of muscle refers to its ability to return to its original resting length after being stretched?

• Responsiveness

• Conductivity

• Elasticity

• Extensibility

What is the plasma membrane of a muscle fiber called?

• Sarcoplasm

• Sarcolemma

• Myofibril

• Sarcoplasmic reticulum

What is the role of glycogen in muscle fibers?

• To store oxygen needed for muscle activity

• To provide energy with heightened exercise

• To activate the muscle contraction process

• To form a network around each myofibril

What is the function of the sarcoplasmic reticulum in muscle fibers?

• It stores oxygen needed for muscle activity

• It acts as a calcium reservoir

• It provides energy with heightened exercise

• It forms the main portion of the sarcoplasm

What are the contractile proteins responsible for muscle contraction?

• Troponin and tropomyosin

• Myosin and actin

• Dystrophin and myosin

• Actin and troponin

Which regulatory proteins determine when a muscle fiber can contract?

• Myosin and actin

• Dystrophin and actin

• Troponin and tropomyosin

• Myosin and dystrophin

What is the most clinically important accessory protein associated with muscle fibers?

• Myosin

• Actin

• Dystrophin

• Troponin

What is the functional contractile unit of a muscle fiber?

• Sarcomere

• Myofibril

• Motor unit

• Synapse

What happens to a muscle if nerve connections are severed or poisoned?

• It becomes stronger

• It becomes paralyzed

• It contracts continuously

• It grows larger