________ involves the alteration of peripheral resistance by acting directly on precapillary sphincters.
Which hormone is released by the kidneys when blood pressure falls or the oxygen content of the blood becomes abnormally low?
Which of the following will cause a decrease in blood pressure?
A)increased levels of aldosterone
B)increased levels of angiotensin II
C)increased blood volume
D)increased levels of ANP (atrial natriuretic peptide)
E)increased levels of ADH (antidiuretic hormone)
Which of the following changes will result in increased blood flow at an injury site during inflammation?
A)increased blood volume
B)increased vessel diameter
C)increased blood pressure
D)decreased peripheral resistance
E)relaxation of precapillary sphincters