Question

multiple choice question
the nervous system can trigger vasoconstriction and vasodilation of arteries. what effect does this have?
o it influences blood flow and blood pressure.
o it assists with oxygen exchange across the vessel wall.
o it forces nutrients across the vessel wall.

Explanation:

Vasoconstriction narrows arteries reducing blood - flow and increasing blood pressure, while vasodilation widens arteries increasing blood - flow and decreasing blood pressure. Oxygen and nutrient exchange mainly occur in capillaries, not directly affected by arterial vasoconstriction/vasodilation.

Answer:

It influences blood flow and blood pressure.