Like skeletal muscle cells, cardiac muscle cells have an absolute refractory period prior to repolarization.

The main functions of the cardiovascular system include the transport and exchange of respiratory gases, nutrients, and wastes throughout the body.  rev: 09_08_2016_QC_CS-59892

Nodal cells contain fast voltage-gated calcium channels.

The following sentence uses which pattern of development? Sometimes, as the Earth orbits the Sun, it comes between the Sun and the Moon. When this happens, the Earth throws a dark shadow across the Moon.

Using synonyms in place of original wording is an appropriate method of paraphrasing.

The following sentence uses which pattern of development? An eclipse is an astrological event that occurs when one object gets in between you and another object and blocks your view.

Cardiac output equals the

Coronary vessels are open when the heart is

Occlusion of blood vessels tends to lead to

At the AV node of the conduction system, the action potential is