Physical Education A-Level
Chemical control of heart rate
What Chemical control of heart rate means in Physical Education A-Level, as defined for AQA.
Definition of Chemical control of heart rate
Check what you remember
Read the wording for your board, then hide it and explain Chemical control of heart rate in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: AQA
Increased carbon dioxide and the associated fall in pH raise sympathetic stimulation and reduce parasympathetic stimulation of the sinoatrial node, so heart rate increases.
Topics that use Chemical control of heart rate
- Cardiovascular system (AQA A-Level)
Related terms
- Affinity for oxygen
- Antagonistic action of the two divisions
- Anticipatory rise
- Autonomic control of heart rate
- Baroreceptors
- Bohr shift during exercise
- Cardiac output
- Cardiac output and oxygen uptake
Using Chemical control of heart rate in the exam
Check the command word and mark scheme for your exact question. After comparing your explanation with the reference, use the term in an answer on the linked topic. This practice does not predict an exam mark.
Practise Physical Education questions
Create a free account to answer exam-style questions on this topic and get feedback on your answers.
Start free
All Physical Education A-Level termsA week of Premium from your first lesson · Then the free plan continues · No card, no charge