Which of the following represents the correct order of the cardiac cycle?
a) purkinje fibers, av nodes, sa node, bundle of his
b) av node, sa node, bundle of his, purkinje fibers
c) sa node, bundle of his, av node, purkinje fibers
d) sa node, av node, purkinje fibers, bundle of his
e) sa node, av node, bundle of his, purkinje

E; SA node, AV node, bundle of His, Purkinje fiber

Explanation:

During each cardiac cycle, the heart contracts and then relaxes.

As deoxygenated blood flow into the left atrium, the SA (Sino-atrial) node triggers a wave of contraction that spreads over the heart muscle of both atria, emptying the atria.

When electrical impulse reaches the AV (Atrioventricula) node it is slowed down to allow the atria to finish emptying into the ventricle. After this, the AV node triggers its own electrical impulse, which quickly spreads to the ventricular muscle through the AV bundle, bundle of His and Purkinje fibre.

This results in a wave of contraction which sweeps upwards from the apex of the heart to the base pumping the blood into the pulmonary artery and the aorta.

l m a o

explanation:

minerals contribute to our overall health because they your body grow, develop, and stay healthy. our bodies use minerals to us function throughout the day.tromhey us build strong bones, so we can do more things in life. with certain minerals, they can you maintain a normal heartbeat!

though, as as minerals are for us, they can also be very dangerous if one were to consume too many. if you were to take too much minerals, or even vitamins, you could experience nausea and diarrhea. all trace minerals can be very toxxic at high levels of consumption. taking too much of some minerals will result in hair loss! but this goes with almost everything in life, taking too much of something that is good, will eventually be bad for you.

my intake in minerals was normal. there really is no need to improve, i am healthy, and i am experiencing no nausea or diarrhea. i am as healthy as a bee. ☺ (sorry that i cannot you with the mineral intake)

what i have learned so far is that taking too much something can be very bad for you. taking too many minerals or vitamins, or anything healthy in general, can result in nausea and diarrhea, as well as hair loss. it would be a good idea to track what you put into your body, good or bad.