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Anatomy
quiz 10
| Question | Answer |
|---|---|
| Erythrocytes begin their maturation sequence in red bone marrow from nucleated cells known as: | hematopoietic stem cells. |
| The term blood type refers to the type of blood cell | antigen |
| Atria are often called _____ because they receive blood from vessels called veins. | receiving chambers |
| The molecule that makes up 95% of the dry weight of each red blood cell and is responsible for the red pigment is | hemoglobin. |
| The bulk of the heart wall is the thick, contractile middle layer called the | mycardium |
| The _____ drains much of the superficial leg and foot. | great saphenous vein |
| A glycoprotein hormone that is secreted to increase oxygen concentration in the tissues is | erythropoietin. |
| All of the following are granulocytes except | lymphocytes |
| During pregnancy, what happens to the oxygenated blood returned from the placenta via the umbilical vein? | It flows into the inferior vena cava. |
| 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 |
| 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 |
| 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 |
| Platelets play an important role in | blood clotting |
| Which types of arteries are also called conducting arteries and include the aorta? | elastic |
| A graphic record of the heart’s electrical activity is a(n) | ecg |
| The normal ECG is composed of all of the following except a | e wave |
| Neutrophils are highly mobile and phagocytic. They migrate out of blood vessels and into tissue spaces. This process is called | diapedesis |
| The four structures that compose the conduction system of the heart are the | SA node, AV node, AV bundle, and Purkinje fibers. |
| The outermost layer of the larger blood vessels is the tunica | adventitia. |
| _____ is used to determine the volume percentage of red blood cells in whole blood. | Hematocrit |
| After blood leaves the lungs and returns to the heart, it enters the | left atrium. |
| Which division of the autonomic nervous system sends fibers to the heart? | ympathetic parasympathetic |
| Which of the following is not a formed element found in the blood? | plasma |
| Renal veins drain blood from the | kidneys |
| From which vessels do myocardial cells receive blood? | coronary arteries |
| The normal cardiac impulse that initiates mechanical contraction of the heart arises in the | sa nodes |
| A decrease in the amount of white blood cells is called | leukopenia |
| The free edges of the atrioventricular valves are anchored to the | papillary muscles. |
| The type of membranous tissue that lines the heart and blood vessels is the | endothelium |
| 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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