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A&P II lab exam 1
It includes ECG, platelets, WBC, RBC, heart anat and phys, arteries and veins
| Term | Definition |
|---|---|
| P wave | represents atrial depolarization |
| PR interval | represents a slight delay in the transmission of the impulse from the AV node to the ventricles |
| QRS complex | represents ventricular depolarization |
| ST segment | represents time between ventricular depolarization and repolarization |
| T wave | represents ventricular repolarization |
| QT interval | represents ventricular systole |
| pulmonary trunk | carries blood from the right ventricle and divides into the left and right pulmonary arteries |
| left and right pulmonary arteries | carry blood to the lungs to be oxygenated |
| pulmonary veins | empty newly oxygenated blood into the right atrium |
| ascending aorta | departs the heart |
| aortic arch | three major branches stem off |
| brachiocephalic artery | short artery will quickly branch into the right common carotid artery and the right subclavian artery |
| common carotid artery | leads up through the right and left sides of the neck |
| subclavian artery | third branch off of the aortic arch (left) and branches off of brachiocephalic (right); passes through the shoulders |
| axillary artery | passes through axillary region |
| brachial artery | branches form axillary |
| ulnar artery | inside arm, branches from brachial |
| radial artery | outside arm, branches from brachial |
| descending thoracic aorta | runs along dorsal wall of the cavity, just left of spinal column |
| descending abdominal aorta | passes through the diaphragm and enters the abdominal vacity where it travels along the posterior wall of the cavity, resting on the anterior surface of the spinal column |
| celiac trunk | supplies the stomach, spleen, pancreas, and liver; left gastric artery, splenic artery, and common hepatic artery branch off |
| superior mesenteric artery | supplies the small and large intestine. attaches to the aorta superior to, but very close to the left renal artery |
| inferior mesenteric artery | supplies the distal portion of the large intestine |
| renal arteries | paired; one of the renal arteries departs the descending aorta before the other |
| gonadal arteries | depart the aorta between the renal arteries and the inferior mesenteric artery |
| common iliac arteries | divides into an internal and an external iliac artery then they branch into the femoral artery |
| common iliac veins | divides into an internal and an external iliac vein then into the femoral vein |
| inferior vena cava | travels to the right of the aorta, along the back the abdominal cavity to where it passes through the diaphragm behind the liver |
| renal veins | drain directly into the inferior vena cava |
| right gonadal vein | connects directly to the inferior vena cava |
| left gonadal vein | drains into the left renal vein |
| hepatic portal blood flow | blood from the stomach, liver, spleen and pancreas, small intestine and large intestine passes through a second capillary bed |
| inferior mesenteric vein | drains into the splenic vein |
| splenic vein | drains with the gastic vein into the superior mesenteric cein to form the hepatic portal vein |
| brachial, ulnar, and radial veins | there are two brachial veins that break off into two ulnar veins and two radial veins |
| neutrophils | phagocytize bacteria |
| eosinophils | phagocytize allergens and antigen-antiboody complexes, combat parasites |
| basophils | release histamine and heparin |
| monocytes | phagocytize pathogens, dead cells and debris; become macrophages |
| lymphocytes | destroy virus-infected cells and cancer cells, coordinate immune system, secrete antibodies |
| coagulation | clotting cascade |
| platelet plug | adhesion of platelets to the damaged vessel wall or exposed connective tissue, and aggregation to each other, creating the physical plug |
| vascular spasm | immediate local contraction of the smooth muscle of injured vessel to decrease its diameter |
| SA node | normal paccemaker of the heart, initiates each electrical and contractile cycle |
| AV node | sends electrical signal through the ventricle walls via the AV bundle, bundle branches and purkinje fibers |
| hematocrit | measures the proportion of the blood volume comprised of erythrocytes |
| megakaryocytes | large bone marrow cell that contains storage granules of numerous chemicals including factors that activate coagulation |
Created by:
tb1285
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