Question

1. the contraction of the heart is known as which of the following?

metabolism
systole
diastole
conduction

Explanation:

Systole refers to the contraction phase of the heart, when it pumps blood out to the body and lungs. Metabolism is the set of life - sustaining chemical reactions in organisms. Diastole is the relaxation phase of the heart. Conduction refers to the transmission of electrical impulses in the heart.

Answer:

B. Systole