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Bio 255 Test 4
| Question | Answer |
|---|---|
| The blood vessel type allowing exchange of respiratory gases, delivery of nutrients, and removal of wastes to and from the tissues is the | capillary. |
| Which of the following is a regulatory function of blood? | maintenance of normal pH in body tissues |
| You obtain a tube of blood from a patient. No anticoagulants are in the tube, so the blood clots. The tube is centrifuged and you remove the liquid from atop the clot and cells. The liquid thus obtained is called | serum. |
| Together, leukocytes and platelets comprise approximately ________ percent of total blood volume. | 1 |
| Each hemoglobin moleculae can carry __ oxygen molecules on the __ of heme(s). | 4, iron |
| Select the correct statement regarding blood cell formation. | Red marrow is the main site of blood cell formation throughout adult life. |
| James has a hematocrit of 59%. This is | above normal |
| The normal percentage of white blood cells that are neutrophils is | above 60% |
| Which of the following is characteristic of all leukocytes? | They are nucleated. |
| Platelets are made in the __ and they circulate about __ days. | red bone marrow, 7 |
| What process stops all your blood from leaking out if you cut yourself? | C. hemostasis |
| Select the correct statement regarding age-related blood disorders. | They include abnormal thrombus and embolus formation. |
| Compared to skeletal muscle, cardiac muscle | has gap junctions that allow it to act as a functional syncytium. |
| Blood is carried to capillaries of the myocardium by way of | coronary arteries. |
| Which of the following is NOT part of the conduction system of the heart? | atrioventricular valve |
| Fluid escaping the circulatory sytem is returned to the | subclavian veins. |
| Which tunic of an artery contains endothelium? | tunica intima |
| The hepatic portal vein | carries nutrient-rich blood to the liver. |
| The term blood islands refers to | embryonic masses of mesodermal cells giving rise to the endothelial lining of blood vessels. |
| Lymph is most like 3 | interstitial fluid. |
| The lymphatic capillaries are | ore permeable than continuous blood capillaries. |
| Which is not a mucosa-associated lymphatic tissue? | Thymus |
| In the spleen, which consists mostly of reticular fibers and lymphocytes involved in immune functions? | the white pulp |
| Which lymphatic organ does NOT directly fight pathogens? | Thymus |
| Which tonsil surrounds the openings of the auditory tubes? | tubal, pharengeal |
| The thymus is derived from | the endoderm |
| Which allows you to hold your breath? | vestibular folds of the larynx |
| Which describes differences observed as the conducting tubes of the lungs become smaller? | Smooth muscle amount increases. |
| Which would NOT be considered part of the conducting zone of the respiratory system? | alveoli |
| The respiratory membrane is a combination of | alveolar and capillary walls and their fused basal lamina. |
| The smallest subdivision of a lung that can be seen with the naked eye is a(n) | lobule |
| Surfactant helps to prevent the alveoli from collapsing by | reducing the surface tension of alveolar fluid. |
| The respiratory system is derived from | endoderm |
| Your false vocal cords are used to___ and they are found ___ your true vocal cords. | hold your breath, Above |
| Which of the following is true about blood serum? | mostly water. and other solutes including electrolytes, gases, and nutrients |
| Which carries oxygen in erythrocytes? | hemoglobin |
| Which blood cells make antibodies? | B cells give rise to plasma cells, which produce antibodies |
| The right coronary artery supplies blood to the | posterior interventricular artery and marginal |
| Which lists the components of the heart's conduction system in the proper order? | SA nodes, AV node, Av bundle, bundle branches |
| Both lymph and venous blood flow are heavily dependent on | skeletal muscle contractions and differences in thoracic pressures due to respiratory movement. |
| Which cells phagocytocize antigens and help to activate the immune response against them? | Macrophages |
| Dividing B cells in follicles with germinal centers are found in the ___ of a lymph node. | Cortex |
| In the spleen, which consists mostly of reticular fibers and lymphocytes involved in immune functions? | The White pulp |
| The thymus is derived from | endoderm |
| Which lung cell type makes surfactant that allows alveoli to remain open? | Type II cells |
| The site of vascular and bronchial attachments to the lungs is the | hilus, root |
| The factors responsible for holding the lungs to the thorax wall include | no external openings to the pleural cavities. |
| Respiratory control centers are located in the | medulla and pons |
| Intercalated discs allow the heart myocardium to behave as a functional syncytium. Intercalated disks are composed of | groups of gap junctions |
| Which of the following is true about blood plasma? | 90% water |
| James has a hematocrit of 34%. This is | below normal, Normal Range Guys: 42-54, Girls: 37-47 |
| Which blood cells orchestrate the complex interactions of cell functions in the immune system, allowing the body to eliminate infections? | T cells |
| Platelets initially stick to the wall of a damage blood vessel because | attach to exposed collagen |
| During a normal cardiac cycle, the atria contract when they are directly stimulated by the | AV valves open |
| The circulatory system is derived from | Mesoderm |
| Which is a site of fetal erythrocyte production? | fetal yolk sac, liver and spleen |
| Lymphatic vessels and lymph nodes develop from | veins |
| Which will vibrate and create sounds as air rushes out your glottis? | mucosa folds |
Created by:
Bade44
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