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🔬 Biology  ·  Structural Organisation in Animals  ·  NEET

Skeletal muscle fibres appear striated because the arrangement of actin and myosin produces:

Answer: Alternate light and dark bands.

  • A Randomly scattered granules
  • B A single central nucleus
  • C Alternate light and dark bands
  • D Branching cross-bridges

Correct answer: C. Alternate light and dark bands

Explanation: In striated muscle the regular overlap of thin actin and thick myosin filaments creates alternating light (I) and dark (A) bands, giving a striped appearance.

Four Basic Animal Tissue TypesEpithelialcovering/liningsquamous, cuboidal,columnarprotection,secretionConnectivecells in matrixareolar, adipose,cartilage, bone, bloodsupport,transportMuscularcontractile fibresskeletal, smooth,cardiacmovement,contractionNeuralneurons + neurogliaexcitable, conductsimpulsessignaltransmissionAll four tissue types combine to form organs; organs combine to form organ systems

The four basic animal tissue types and their core functions: epithelial (covering/lining), connective (support and transport), muscular (movement), and neural (signal conduction).

Concept context

The four basic animal tissue types (epithelial, connective, muscular, neural) and the cockroach as a model organism for organ-system level organisation.

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