PAPER 2026 FULL QUESTIONS AND
SOLUTIONS VERIFIED A+
◉ Location of skeletal muscle. Answer: in skeletal muscles attached
to bones or occasionally to skin
◉ Excitability. Answer: ability to respond to stimuli
◉ Conductivity. Answer: The ability of an object to transfer heat or
electricity to another object.
◉ Extensibility. Answer: ability to be stretched
◉ Elasticity of muscle. Answer: Ability of muscle fibers to recoil and
resume their resting length after being stretched.
◉ Contractibility. Answer: ability to shorten/contract
◉ Sarcomere. Answer: Contractile unit of muscle (z disc to z disc)
◉ Sarcolemma. Answer: muscle cell membrane
,◉ sarcoplasmic reticulum (SR). Answer: organelle of the muscle
fiber that stores calcium
◉ Z disc. Answer: coin-shaped sheet of proteins that anchors the
thin filaments and connects myofibrils to one another
◉ M line. Answer: middle of sarcomere
◉ A band. Answer: dark area; extends length of the thick filaments
◉ I band. Answer: light band, actin only
◉ Zone of Overlap. Answer: where thick and thin filaments overlap
◉ Thick filaments. Answer: myosin
◉ Thin filaments. Answer: actin
◉ contractile proteins in muscle. Answer: actin and myosin
, ◉ structural proteins. Answer: proteins that form an organism's
physical attributes
◉ regulatory proteins. Answer: tropomyosin and troponin
◉ Microfilaments. Answer: Long, thin fibers that function in the
movement and support of the cell
◉ Myofibrils. Answer: Microscopic protein filaments that make up
muscle cells.
◉ muscle fiber. Answer: muscle cell
◉ muscle fassicle. Answer: bundle of muscle fibers
◉ Epimysium. Answer: surrounds entire muscle
◉ Perimysium. Answer: Connective tissue surrounding a fascicle
◉ Endomysium. Answer: Connective tissue surrounding a muscle
fiber