Question

an increase in blood pressure will cause a reflex ____________ in heart rate.
a increase
b decrease
c no change
d increase, then decrease

Explanation:

When blood pressure increases, baroreceptors detect this change. The body's homeostatic mechanism (negative - feedback loop) aims to lower blood pressure. One of the ways is to decrease the heart rate. A decrease in heart rate reduces cardiac output, which in turn helps to lower blood pressure back towards normal levels.

Answer:

B. decrease