WorksheetsMuscular Tissue
Total questions: 10
Worksheet time: 20mins
Which type of muscle tissue is under direct voluntary control?
Cardiac muscle
Smooth muscle
Skeletal muscle
None of the above
What is the functional unit of skeletal muscle called?
Actin
Sarcomere
Troponin
Myofibril
Which statement best describes the regulation of cardiac muscle tissue?
Non-striated
It is under voluntary control
Which property of muscular tissue refers to its ability to respond to stimuli by generating action potentials?
Excitability
Elasticity
Extensibility
The outermost layer of connective tissue that surrounds the entire skeletal muscle is called:
Epimysium
Endomysium
Which protein filament in a sarcomere is primarily responsible for generating the force of muscle contraction?
Myosin
Tropomyosin
Troponin
Actin
The A-band in a sarcomere corresponds to the region where:
Only myosin filaments are present
Only actin filaments are present
Both myosin and actin filaments overlap
Neither myosin nor actin filaments are present
Which ion is released from the sarcoplasmic reticulum to initiate muscle contraction?
Chloride (Cl-)
The power stroke in muscle contraction refers to:
ATP hydrolysis by myosin heads
Release of ADP and phosphate by myosin heads
Sliding of actin filaments past myosin filaments
Detachment of myosin heads from actin filaments
During muscle contraction, which regulatory protein binds to calcium ions and moves tropomyosin away from the myosin-binding sites on actin?
Myosin
Actin
Tropomyosin
Troponin
