When Blood Pressure Falls Below Normal, Indicate What Happens to Each

When blood pressure falls below normal, indicate what happens to each of the following factors to restore the blood pressure back toward normal.
A. When the blood pressure falls below normal, the rate of firing in the afferent nerves originating from the carotid-sinus and aortic-arch baroreceptors
a. increases.
b. decreases.
c. does not change.
B. As a result of A, the medullary cardiovascular center responds by _____________ the rate of firing in the sympathetic cardiac nerve.
a. increasing
b. decreasing
c. not changing
C. Also as a result of A, the cardiovascular center __________ the rate of firing in the parasympathetic nerve supply to the heart.
a. increases
b. decreases
c. does not alter
D. Also as a result of A, the rate of firing in the sympathetic vasoconstrictor nerve __________ by the cardiovascular center.
a. is increased
b. is decreased
c. is not altered
E. As a result of B and C, the rate of firing of the SA node
a. increases.
b. decreases.
c. remains unchanged.
F. As a result of E, the heart rate
a. increases.
b. decreases.
c. remains unchanged.
G. As a result of D,
a. arteriolar vasoconstriction occurs.
b. arteriolar vasodilation occurs.
c. there is no change in arteriolar radius.
H. As a result of G, total peripheral resistance
a. increases.
b. decreases.
c. remains unchanged.
I. Also as a result of D,
a. venous vasoconstriction occurs.
b. venous vasodilation occurs.
c. there is no change in venous radius.
J. As a result of I, venous return
a. increases.
b. decreases.
c. remains unchanged.
K. As a result of J, end-diastolic volume
a. increases.
b. decreases.
c. remains unchanged.
L. As a result of B and K, stroke volume
a. increases.
b. decreases.
c. remains unchanged.
M. As a result of F and L, cardiac output
a. increases.
b. decreases.
c. remains unchanged.
N. As a result of H and M, blood pressure
a. increases to normal.
b. decreases to normal.
c. remains unchanged.