1) Which of the following is not one of the three main factors influencing blood pressure?
A) cardiac output
B) peripheral resistance
C) emotional state
D) blood volume

2) Which of the following chemicals does not help regulate blood pressure?
A) ADH
B) atrial natriuretic peptide
C) angiotensin II
D) nitric acid

3) Which statement best describes arteries?
A) All carry oxygenated blood to the heart.
B) All carry blood away from the heart.
C) All contain valves to prevent the backflow of blood.
D) Only large arteries are lined with endothelium.