Question

1/30 - homeostasis feedback (dg)
(2024) the diagram shows changes in blood pressure over time
vasodilation and vasoconstriction occur because blood —
flows through veins and arteries is a necessary component for life
is a necessary component for life
flows through the heart at various rates
pressure is controlled by a feedback mechanism

Explanation:

The diagram illustrates a negative feedback loop for blood pressure homeostasis. Vasodilation (widening blood vessels to lower pressure) and vasoconstriction (narrowing blood vessels to raise pressure) are direct responses to deviations from the blood pressure set point, regulated by this feedback mechanism. The other options do not directly explain why these vascular changes occur: blood being necessary for life, flowing through veins/arteries, or flowing through the heart at varying rates do not address the regulatory trigger for vasodilation/vasoconstriction.

Answer:

pressure is controlled by a feedback mechanism