User interface language: English | Español

Date May 2019 Marks available 1 Reference code 19M.3.SL.TZ1.16
Level Standard level Paper Paper 3 Time zone Time zone 1
Command term Outline Question number 16 Adapted from N/A

Question

Outline one consequence for the heart of the eating disorder anorexia nervosa.

[1]
a.

The micrograph shows cardiac muscle.

[Source: https://commons.wikimedia.org/wiki/File:Musculocardiaco.jpg by Goyitrina,
licensed Creative Commons Attribution-Share Alike 3.0]

 

The structure labelled X in the micrograph is a junction between two cardiac muscle cells. Identify the structure labelled X.

[1]
b.

Markscheme

breakdown/weakening of heart muscle
OR
electrolyte imbalance affecting the cardiac cycle
OR
low blood pressure/heart rate ✔

a.

intercalated disc ✔

b.

Examiners report

Some answers on the effects of anorexia nervosa on the heart were too vague to receive credit.

a.

Very few candidates recognised an intercalated disc.

b.

Syllabus sections

Option D: Human physiology » Option D: Human physiology (Core topics) » D.1 Human nutrition
Show 56 related questions
Option D: Human physiology » Option D: Human physiology (Core topics)
Option D: Human physiology

View options