Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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Hemostasis is a quick and localized sequence (cascade) of events that helps to prevent a hemorrhage from occurring when a blood vessel is damaged. Hemostasis involves – amongst other things – the formation of a platelet plug. Describe the three steps involved in the formation of a platelet plug. What complication may arise if a platelet plug (thrombus) were to detach and travel through the circulatory system? How does Aspirin help prevent a thrombus from occurring?
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- Which of the following are mechanisms which prevent clotting under normal circumstances? Select all that apply. platelets are not released into the bloodstream until needed heparin and anti-thrombin circulate in the bloodstream vessels are coated with prostacyclin which repels platelets clotting enzymes are not released into the bloodstream until needed rapid blood flowarrow_forwardDescribe the major steps leading to the formation of a blood clot.arrow_forwardWhy is a patient given intravenous heparin, as well as anti-platelet and fibrinolytic drugs, with specific reference to a heart attack that resulted in the patient being admitted to hospital?arrow_forward
- What is the function of platelets ? THIS IS NOT AND WILL NOT BE GRADEDarrow_forwardList the Physical classification of coagulation factors.arrow_forwardThere are several types of anemia that are caused by defective erythrocytes. Which of the following functions are most likely affected by anemia? The ability to defend the body against bacteria Transportation of carbon dioxide The ability to stop bleeding by forming blood clots Transportation of hormones throughout the bodyarrow_forward
- The intrinsic and extrinsic pathways merge with the formation of: fibrin fibrinogen prothrombin prothrombinase thrombinarrow_forwardDescribe the platelet receptor-ligand interaction and its biological outcomearrow_forwardExplain why erythrocytes are unique in shape and structure. Describe all the factors that make them ideal for transporting oxygen to cells.arrow_forward
- Describe the structure of platelets and explain the process of hemostasisarrow_forwardThrombocytopenia is a reduced number of platelets in the blood. Without a mechanism to compensate for this change you would expect someone with thrombocytopenia to experience a DECREASE in: Oblood viscosity O mean arterial pressure Operipheral resistance all of the abovearrow_forward
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