Answer:
Pressure acting on the molecule reduces.
Explanation:
As a molecule of hemoglobin moves from a narrow region to a wide region in the artery then it experiences a reduced pressure in the wider region and has more free space to move with lesser obstruction.
From the equation of pressure:
[tex]P=\frac{F}{A}[/tex]
where:
F = force
A = area
So, force being constant pressure is inversely proportional to the area, pressure acting on the molecule reduces as a result.
