When the blood pressure of a vessel drops below the critical closing pressure for that vessel,

A) there is hypertension.
B) there is an increase in blood flow.
C) there is an increase in peripheral resistance.
D) the vessel collapses.
E) the vessel expands.

Critical Closing Pressure

Pressure in a blood vessel below which the vessel collapses, occluding the lumen and preventing blood flow.

Vessel Collapses

The condition where blood or lymphatic vessels lose their structural integrity, leading to closure or impairment of blood flow.

Hypertension

A condition characterized by elevated blood pressure levels that can lead to significant health risks if left untreated.