What structure is surrounded by the perimysium? a. Muscle cell b. Muscle c. Fasc

Question

What structure is surrounded by the perimysium? a. Muscle cell b. Muscle c. Fascicle d. Neuron What takes up 80% of muscle cell volume? a. Myofibrils b. Mitochondria c. Sarcoplasmic reticulum d. Z bands Which contractile protein has flexible heads? a. The sacromere b. Actin c. Myosin d. Calmodulin Which is the thicker contractile protein? a. Sarcomase b. Actin c. Myosin d. Calmodulin Which contractile protein is made of repeating monomers? a. The sarcomere b. Actin c. Myosin d. Calmodulin Which ion initiates contraction by depolarization the sarcolemma? a. Sodium b. Potassium c. Calcium d. Manganese What happens when ATP is completely exhausted within a muscle cell? a. Rigor mortis b. Muscle fatigue c. The muscle can't contract d. The membrane is able to repolarize

Explanation / Answer

7. The right answer is option c: fascicles.

Perimysium is a sheath of connective tissue that surrounds muscle fascicles( groups of muscle fibres) eg skeletal muscle fascicles. They protect them from friction and help in lateral contractile movement. Thus this is the correct answer.

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