The Pacemaker of the Heart Is the SA Node

question 86

True/False

The pacemaker of the heart is the SA node.

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Definitions:

Cones

Photoreceptor cells in the retina of the eye that function best in relatively bright light and enable the perception of color and fine detail.

Nocturnal

Pertaining to or occurring during the night; active or awake at night.

Retina

The light-sensitive layer of tissue at the back of the eye that captures images and sends visual information to the brain.

Rods

Photoreceptor cells in the retina of the eye that are responsible for vision at low light levels.