Question

Epinephrine and norepinephrine work on the heart to increase the heart rate. This is an example of:

a. Inotropic effect
b. Dromotropic effect
c. Chronotropic effect
d. Synergistic effect

Answer 1

Epinephrine and norepinephrine increase heart rate through chronotropic effect.

Step-by-step explanation:

The effects of epinephrine and norepinephrine on the heart, increasing the heart rate, are an example of chronotropic effect. Chronotropic effect refers to the changes in heart rate caused by various factors, including the release of certain hormones. In this case, epinephrine and norepinephrine, also known as adrenaline and noradrenaline, act as sympathomimetic drugs, stimulating the heart rate as part of the body's fight-or-flight response.