Explain why the contraction times of the atria and ventricles in the heart differ.
The atria have a shorter contraction time as the ventricles as they only need to pump blood into the ventricles. The contraction time of the ventricles is longer as they need to pump blood through the aorta to the whole body.
PK
Related Biology GCSE answers
All answers ▸How does the eye respond to light?
What is the function of bile?
Explain how a mutation in the genetic code leads to a dysfunctional enzyme.
This question is about the nervous system. Describe the difference between the function of a receptor and the function of an effector. In your answer you should give one example of a receptor and one example of an effector.