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Date November 2020 Marks available 4 Reference code 20N.3.HL:.tz0.12
Level Higher Level Paper Paper 3 Time zone time zone 0
Command term Describe Question number 12 Adapted from N/A

Question

Describe the physiological effects of excess alcohol on the body.

[4]
a.

Biathlon is a winter sport that combines cross-country skiing and rifle shooting. Discuss the possible effects of alcohol on a biathlete’s performance.

[5]
b.

Markscheme

Acute:
hydration and kidney function;

cardiovascular system;

thermoregulation;

neurologic systems;

dehydration caused by the effect of alcohol on the release of ADH / loss of coordination / reduced ability to concentrate;

reduced inhibitions «become more aggressive»;

markedly reduced heart rate, potentially leading to unconsciousness or coma;

cognitive impairment / slurred speech/vision impairment;

vasodilation to the skin;

decreased blood viscosity;

reduced core body temperature;

raised blood pressure;

Chronic:
liver damage including jaundice/cirrhosis/liver cancer/liver failure;

damage to the kidneys;

heart disease/cardiomyopathy;

alcohol-related brain damage/confusion/depression/forgetfulness;

chronic pancreatitis;

a.

Positive effects:
reduced tremors;

Negative effects:
distorted balance/coordination;

impaired cardiac function;

reduced power/speed/strength;

inhibited cognitive processing/reaction time;

inhibition of gluconeogenesis;

lowers body temperature;

impairs vision/blurred vision and loss of control eye movement that impairs judgement;

causes dehydration which can impair performance;

b.

Examiners report

Many students not reading "physiological effects" and answered generically. 

a.

Not many answered with "Inhibition of gluconeogenesis"- see markscheme. 

b.

Syllabus sections

Option D: Nutrition for sports, exercise and health » D.6. The effects of alcohol on performance and health (HL only) » D.6.1. Describe the acute effects of excess alcohol on the body.
Option D: Nutrition for sports, exercise and health » D.6. The effects of alcohol on performance and health (HL only) » D.6.2. Outline the possible effects of excessive chronic alcohol intake on body systems.
Option D: Nutrition for sports, exercise and health » D.6. The effects of alcohol on performance and health (HL only)
Option D: Nutrition for sports, exercise and health

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