CourseCourseConceptConceptDocumentDocument

IB Biology HL B2.3.9 Hl Cardiac and Striated Muscle Questions

Explore how gap junctions synchronize branched cardiac cells and how striated muscle fibres use nuclei, myofibrils and mitochondria for contraction in IB Biology HL B2.3.9.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Explain how branching and gap junctions at intercalated discs spread cardiac impulses and synchronize contraction.
  • Compare skeletal fibres and cardiac cells by nuclei, branching, sarcomeres and myofibril structure.
  • Explain how myogenic cardiac cells initiate impulses without nervous input.

IB Biology HL B2.3.9 Hl Cardiac and Striated Muscle Questions 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

All question bank results loaded