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IB Biology HL 2.3.9 Cardiac and Striated Muscle Question Bank

Practise IB Biology HL 2.3.9 through exact HL questions on cardiac-cell branching, intercalated discs, impulse propagation and comparison with skeletal muscle.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Analyse how branching, intercalated discs and gap junctions propagate impulses through cardiac muscle.
  • Compare cardiac and skeletal striated muscle using nuclei, sarcomeres and cell architecture.
  • Evaluate muscle ultrastructure by linking each feature to synchronised contraction.

B2.3.9 (HL)—Cardiac and striated muscle question 1

[Maximum number: 1]

Which features are found in both cardiac and striated muscle?

A

Nuclei and branched myofibrils

B

Sarcomeres and unbranched myofibrils

C

Mitochondria and branched myofibrils

D

Sarcomeres and mitochondria

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