Relate myofibrils, branching, cell length and nuclear number to the organization of different muscle tissues.
Tę umiejętność sprawdza 5 zadań wzorowanych na arkuszach IB z lat 2023–2026.
A student compares a skeletal muscle fibre with a cardiac muscle cell. Which pair correctly gives a feature shared by both and a feature distinguishing them? A. Shared: contractile myofibrils; difference: the cardiac cell is usually branched B. Shared: one…
Which pair of structures occurs in both mammalian cardiac muscle cells and skeletal muscle fibres? A. Chloroplasts and mitochondria B. Central vacuoles and cilia C. Cellulose walls and sarcomeres D. Sarcomeres and mitochondria
Aseptate fungal hyphae and skeletal muscle fibres are often considered atypical cells. What feature do they share? A. Each lacks every membrane-bound organelle B. Many nuclei can occupy one continuous cytoplasmic region C. Both have a cellulose wall D. Both…
State one way in which a skeletal muscle fibre differs from a typical small animal cell.
Which description correctly relates the structural levels in skeletal muscle? A. A muscle fibre is typically multinucleate and contains myofibrils made of repeated sarcomeres B. Each sarcomere is a whole multinucleate muscle fibre C. Myosin makes cross-bridges…
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