<span>The sequence is as follows:
c, d, a, b, f, g, e
The impulse starts at the SA node that has its own contraction rhythm (but can be faster or slower depending on other impulses or hormones). That impulse travels then through the atria and is slowed down by the atrioventricular septum except for a region in the right atrium called AV node where the impulse has continuity. The impulse travels then to the ventricles through the AV bundle. The impulse continues through bundle branches to other fibers: Purkinje fibers. These Purkinje fibers cause then a contraction that goes from the apex of the heart and rapidly through the ventricles.</span>
<span>Phospholipids serve a variety of purposes in the human body. Phospholipids are the building blocks of larger lipids and triglycerides. These molecules are vital for keeping the brain healthy and nourished, preventing inflammation of tissues and allow the building of a variety of healthy fat molecules.</span>
Answer:
Outside
Explanation:
The word <u>outside</u> makes the most sense in this sentence.
Hope it helps!
Dependent should be the control variable
Cholesterol I do believe is the answer