Answer:
Explanation:
1) Excitation brings about contraction.
2) Contraction leads to an increase in blood pressure.
3) Changes in blood pressure results in the opening and closing of the heart valves.
4) The opening and closing of heart valves then regulates the flow of blood and it's volume.
Answer:
Explanatio— What are the chances of having a short, white flower? Your answer can be in fraction, decimal or percent.
Option D is correct.
A synapse is the opening between neurons that neurotransmitters pass through.
