A&P 2 - Exam 1 - Part 1 - Anatomy, Heart
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| The heart lies in the ____________. | show 🗑
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| show | sternum
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| show | 2 through 6
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| How much of the heart's mass is to the left of the body midline? | show 🗑
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| show | thoracic vertebrae 5 through 8
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| The _________ of the heart lies on the diaphragm, pointing to the left. | show 🗑
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| The base of the heart lies below _______________. | show 🗑
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| What is an important clinical aid in diagnosing heart disorders? | show 🗑
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| At birth the heart is __________ and appears __________ in proportion to the chest. | show 🗑
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| show | puberty and 25 years of age
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| In adults, the heart resembles the shape of the _____________. | show 🗑
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| show | pericardium
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| show | fibrous pericardium
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| What is the innermost layer of the pericardium which is divided further into two layers? | show 🗑
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| The serous pericardium is divided into what two layers? | show 🗑
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| show | epicardium
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| _________________ separates the parietal and visceral layers of the serous pericardium. | show 🗑
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| show | friction
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| show | epicardium, myocardium, endocardium
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| What is the outer layer of the heart wall? | show 🗑
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| What is the thick, contractile middle layer of the heart wall? | show 🗑
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| show | myocardium
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| show | endocardium
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| show | endothelial
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| show | "the receiving chambers"
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| The atria receive blood from what? | show 🗑
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| The atria alternately contract and relax to receive ___________ and then push it into the _____________. | show 🗑
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| What wall of the atria is not very thick, since little pressure is needed to move the blood such a small distance? | show 🗑
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| show | auricle
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| show | "pumping chambers"
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| show | thicker
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| The mycardium of the left ventricle is thicker than the right ventricle because it must _________________. | show 🗑
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| What are mechanical devices of the heart that permit the flow of blood in only one direction? | show 🗑
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| What prevents blood from flowing back into the atria from the ventricles when the ventricles contract? | show 🗑
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| show | tricuspid
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| show | papillary muscle by chordae tendineae
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| What is the left AV valve? | show 🗑
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| What are the half-moon shaped flaps separating the ventricles from the pulmonary artery and aorta? | show 🗑
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| show | pulmonary artery
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| The aortic semilunar valve is at the entrance of the ________________. | show 🗑
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| show | skeleton of the heart
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| The skeleton of the heart serves as _________________ between the myocardium of the atria and ventriclea. | show 🗑
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| show | right and left coronary arteries
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| The coronary arteries are the first branches to come off of the _____________. | show 🗑
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| show | both the left and right coronary arteries
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| Each ventricle receives blood from a ____________ branch of the corresponding coronary artery. | show 🗑
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| To which ventricle does the most abundant supply of blood go? | show 🗑
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| show | 50%
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| In what percentage of hearts is the left coronary artery dominant? | show 🗑
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| show | 30%
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| show | anastomoses
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| show | veins, coronary arteries
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| After going through ____________ blood enters the ______________ to drain into the _______________. | show 🗑
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| show | right atrium
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| What is the sinoatrial node (SA Node) also known as? | show 🗑
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| show | sinoatrial node, atrioventricular node, atrioventricular bundle, Purkinje fibers
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| Where is the sinoatrial node located? | show 🗑
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| show | node of Tawara
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| show | in the right atrium along the lower part of the interatrial septum
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| show | bundle of His
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| Where does the atrioventricular bundle originate? | show 🗑
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| show | interventricular septum
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| show | papillary muscles
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| show | cardiac plexuses
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| show | sympathetic and parasympathetic fibers
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| show | the arch of the aorta
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| How do fibers from the cardiac plexus enter the heart? | show 🗑
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| show | sinoatrial node
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| Other than the sinoatrial node, where else can cardiac plexus fiber end up? | show 🗑
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| show | sympathetic nerves
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| What are inhibitory or depressor nerves known as? | show 🗑
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