Worksheets1_Muscle Tissue_Muscular System
Total questions: 15
Worksheet time: 8mins
Which outcome best describes a primary function of the muscular system?
Maintaining posture against gravity
Producing hormones for growth
Storing calcium in bone matrix
Filtering wastes from blood
A student stretches a hamstring and it returns to its original length afterward. Which muscle tissue characteristic explains this recovery?
Elasticity allowing shape recovery
Extensibility permitting lengthening
Excitability sensing a stimulus
Contractility causing shortening
During exercise, why does the muscular system contribute to maintaining body temperature?
Muscle activity generates heat energy
Sweat glands cool muscle fibers
Blood vessels store thermal energy
Nerve signals reduce heat loss
Which feature best distinguishes smooth muscle from skeletal and cardiac muscle at the microscopic level?
Nonstriated fibers arranged in layers
Branched cells with intercalated discs
Multiple nuclei per elongated fiber
Presence of visible striations in fibers
Which pairing correctly matches a muscle type with its typical control and nucleus number?
Cardiac muscle – voluntary control – multinucleated
Skeletal muscle – involuntary control – uninucleated
Skeletal muscle – voluntary control – uninucleated
Smooth muscle – involuntary control – uninucleated
Arrange the skeletal muscle structures from largest to smallest hierarchical level.
Fascicle → Muscle → Muscle fiber → Myofilament
Muscle → Fascicle → Muscle fiber → Myofibril
Myofibril → Muscle fiber → Fascicle → Muscle
Muscle fiber → Muscle → Fascicle → Myofibril
Which statement best describes the sarcomere and its role in contraction?
A repeating unit of myofibrils where actin and myosin slide
A connective tissue sheath that bundles many fibers
A cell membrane that encloses the muscle fiber
A thread-like organelle that stores calcium ions
During a steady jog, which muscle tissue primarily maintains rhythmic contractions, and why?
Cardiac muscle, because it contracts steadily to pump blood
Skeletal muscle, because it is nonstriated and fatigue resistant
Smooth muscle, because it contracts quickly for short bursts
Skeletal muscle, because it contracts involuntarily during endurance
A muscle is organized into bundles of fibers. Which pairing correctly matches the bundle level with its covering?
Fascicle – epimysium covering outside
Whole muscle – perimysium around bundles
Fascicle – perimysium surrounding bundle
Muscle fiber – epimysium within cell
A student argues that membranes around muscle fibers are unnecessary because contraction only shortens fibers. Using evidence, which statement best refutes this claim?
Membranes convert ATP directly into force
Membranes stop impulses from reaching muscles
Membranes only thicken tendons after injury
Membranes let fibers slide and prevent bursting
Which control and motion pairing is accurate for muscle types?
Skeletal muscle is involuntary with rapid motion
Cardiac muscle is voluntary with brief motion
Cardiac and smooth are involuntary with slower motion
Smooth muscle is voluntary with fast motion
Based on Greek roots, which term literally indicates a location within a structure?
Myo- meaning muscle
Endo- meaning within
Peri- meaning surrounding
Epi- meaning over or tip
Which connective tissue layer surrounds an entire skeletal muscle as shown in the diagram?
Epimysium around whole muscle
Sarcolemma around each myofibril
Perimysium around whole fascicle
Endomysium around each fiber
In the structural hierarchy from largest to smallest, which sequence correctly orders the levels shown?
Myofilaments → myofibril → muscle fiber → fascicle → muscle
Muscle → muscle fiber → fascicle → myofilaments → myofibril
Fascicle → muscle → myofibril → muscle fiber → myofilaments
Muscle → fascicle → muscle fiber → myofibril → myofilaments
A student draws arrows from actin and myosin to the term that collectively describes them. Which label best completes the drawing?
Sarcolemma as cell membrane
Sarcomere as repeating units
Myofibrils as threadlike organelles
Myofilaments as thin and thick
