DP Biology (first assessment 2025)

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Question 23M.2.HL.TZ1.d

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Date May 2023 Marks available [Maximum mark: 3] Reference code 23M.2.HL.TZ1.d
Level HL Paper 2 Time zone TZ1
Command term Explain Question number d Adapted from N/A
d.
[Maximum mark: 3]
23M.2.HL.TZ1.d

Explain how cardiac muscle is adapted to its function.

[3]

Markscheme
  1. many mitochondria for aerobic respiration;
  2. cells are branched allowing for faster transmission/allow impulse to spread;
  3. cardiac muscle is myogenic so does not require the CNS to initiate contraction;
  4. cells are not fused together/are connected by gap junctions/intercalated discs (which) allows easier transmission between cells;

Syllabus sections