Week 10 The Heart & Blood
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on it to display the answer.
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| The _____ drains much of the superficial leg and foot. | great saphenous vein
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| In _____, blood moves from veins to other veins or arteries to other arteries without passing through an intervening capillary network. | vascular anastomoses
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| The term blood type refers to the type of blood cell | antigen.
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| A glycoprotein hormone that is secreted to increase oxygen concentration in the tissues is | erythropoietin.
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| Erythrocytes begin their maturation sequence in red bone marrow from nucleated cells known as: | hematopoietic stem cells
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| A graphic record of the heart’s electrical activity is a(n | ECG
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| Which layer of the larger blood vessels is made up of endothelium? | tunica intima
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| The normal ECG is composed of all of the following except a | E Wave
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| After blood leaves the lungs and returns to the heart, it enters the | left atrium
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| Mechanical devices that permit the flow of blood in one direction only are called | valves
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| Microscopic vessels that carry blood from small arteries to small veins are | capillaries.
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| A decrease in the amount of white blood cells is called | leukopenia.
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| Atria are often called _____ because they receive blood from vessels called veins. | receiving chambers
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| Blood flow from the heart through blood vessels to all parts of the body and back to the heart is referred to as _____ circulation. | systemic
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| During fetal circulation, what opening in the septum, between the right and left atria, directs most of the blood so that it bypasses the fetal lungs? | foramen ovale
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| The bulk of the heart wall is the thick, contractile middle layer called the | myocardium.
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| Which of the following is not a formed element found in the blood? | Plasma
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| The type of membranous tissue that lines the heart and blood vessels is the | endothelium.
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| The normal cardiac impulse that initiates mechanical contraction of the heart arises in the | SA Node
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| Which types of arteries are also called conducting arteries and include the aorta? | elastic arteries
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| Which sphincters function as regulatory valves that reduce the flow of blood through a network of capillaries when they contract and constrict the arterioles? | precapillary sphincters
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| he free edges of the atrioventricular valves are anchored to the | papillary muscles.
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| Neutrophils are highly mobile and phagocytic. They migrate out of blood vessels and into tissue spaces. This process is called | diapedesis.
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| The four structures that compose the conduction system of the heart are the | SA node, AV node, AV bundle, and Purkinje fibers.
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| Which division of the autonomic nervous system sends fibers to the heart? sympathetic somatic parasympathetic | Both A & B ,
sympathetic parasympathetic
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| The _____ is(are) supplied with blood from the left subclavian artery. | head and upper extremities
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| From which vessels do myocardial cells receive blood? | coronary arteries
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| The heart has its own special covering, a loose-fitting inextensible sac called the | pericardium.
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| The brachiocephalic vein drains blood from the | head, neck, and upper extremity.
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| The heart valves that are located where the trunk of the pulmonary artery joins the right ventricle and where the aorta joins the left ventricle are called | semilunar valves.
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| Factors that affect the strength of myocardial contraction are called | inotropic factors.
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| Cardiac output is determined by | stroke volume and heart rate.
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| Starling’s law of the heart states that, within limits, the longer, or more stretched, the heart fibers are at the beginning of the contraction, the | stronger the contraction.
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| The localized pressure gradient needed to maintain blood flow in a tissue is called | perfusion pressure.
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| Blood viscosity stems mainly from the red blood cells but also partly from the _____ in blood. | protein molecules present
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| The difference between systolic pressure and diastolic pressure is called | pulse pressure.
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| Inhibition of sympathetic vasoconstrictor impulses is considered a major mechanism of | vasodilation.
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