The Contractile Cycle of the Heart Normally Originates from a Pacemaker

question 9

True/False

The contractile cycle of the heart normally originates from a pacemaker cell within the sinoatrial node.

---

Definitions:

Interest

The expense associated with lending money or the profit from an investment, usually shown as a percentage.

Days

A unit of time equivalent to 24 hours, generally used to measure durations and intervals.

Investment

The allocation of resources, usually money, in expectation of generating income or profit.

Interest

The cost of borrowing money, usually represented as a percentage of the principal loan amount.