Which of the following would not result in the dilation of the feeder areterioles and opening of the precapillary sphincters in systemic capillary beds?
A) a decrease in stimulation of vasomotor fibers
B) a local increase in tissue oxygen content
C) an increase in local tissue carbon dioxide
D) a decrease in local tissue oxygen content
The short-term controls of blood pressure, mediated by the nervous system and blood borne chemicals, primarily operate via all but which of the following?
a) centers in the medulla oblongata and the pons
b) reflex arcs involving baroreceptors
c) reflex arcs associated with vasomotor fibers
which of the following chemical substances does not help regulate blood pressure?
a) oxytocin
b) atrial natriuretic peptide
c) angiotensin II
d) antidiuretic hormone (ADH)