Histology final exam Questions and Answers 100% pass

Histology final exam Questions and Answers 100% pass ____ have valves to prevent backflow. Select one: veins arteries capillaries - ANS- veins ________ are thin-walled and have large lumens. Select one: arteries veins capillaries - ANS- veins __________ is a blood disorder caused by the lack of vitamin B-12. Select one: Hemolytic anemia Polycythemia Pernicious anemia Sickle-cell disease - ANS- Pernicious anemia __________ is a blood disorder caused by the lack of vitamin B-12. Select one: Pernicious anemia Hemolytic anemia Polycythemia Sickle-cell disease - ANS- Pernicious anemia __________ is an increased rate of red blood cell destruction Select one: Hemolytic anemia Pernicious anemia Aplastic anemia Sickle-cell disease - ANS- Hemolytic anemia A medical student experienced a puncture wound on her leg which later became swollen and tender due to infection. Because of her knowledge of the immune system, she knew that defense cells are attracted from the blood to the damaged tissue. What barrier did these cells most likely have to overcome to exit the blood capillary and enter the infected tissue? Select one: tight junctions between endothelial cells smooth muscle of the tunica media elastic fibers of the tunica intima collagen fibers of the tunica adventitia - ANS- tight junctions between endothelial cells A motor neuron carries impulses Select one: a. always within the CNS b. to muscles and glands c. to the CNS - ANS- b. to muscles and glands A person died during the night. The next morning, the person's body was described as being in rigor mortis. What causes rigor mortis? (Note: if you understood the events that happen during skeletal muscle contraction, you'll know the answer) Select one: a. Absence of ATP preventing detachment of the myosin heads from actin. b. Failure to disengage tropomyosin and troponin from the myosin active sites. c. Increased lactic acid production d. inhibition of Ca2+ leakage from the extracellular fluid and sarcoplasmic reticulum. e. enhanced retrieval of Ca2+ by the sarcoplasmic reticulum - ANS- a. Absence of ATP preventing detachment of the myosin heads from actin. A person infected with parasitic worm would have an increased number of __ Select one: a. eosinophil b. neutrophil c. lymphocyte d. platelet e. monocyte - ANS- a. eosinophil A researcher opens the chest of an anesthetized mouse and microinjects a small amount of a fluorescent dye into a single cardiac muscle cell at the base of the left ventricle. Over time, the dye spreads toward the left atrium. From the list below, which structure is most likely responsible for facilitating this spread? Select one: T tubules sarcoplasmic reticulum endomysium parasympathetic fibers intercalated discs - ANS- intercalated discs A reticulocyte is Select one: a blood cell that secretes reticular fibers a type of connective tissue cell a young red blood cell a young white blood cell - ANS- a young red blood cell A sarcomere is Select one: a. the length of the H zone. b. the distance between Z lines. c. formed from myosin only. d. between the I bands. - ANS- b. the distance between Z lines. A sensory neuron carries impulses Select one: a. always within the CNS b. to muscles and glands c. to the CNS - ANS- c. to the CNS Adipocytes Select one: a. store fat b. lines blood vessels and capillaries c. secrete collagenous and elastic fibers d. act as phagocytic cells - ANS- a. Store Fat All of the following are connective tissue cells responsible for defense and immune functions except: Select one: a. neutrophils b. fibroblasts c. lymphocytes d. plasma cells - ANS- b. fibroblasts Alveolar type II cells are: Select one: squamous cells involved in gas exchange amoeboid, phagocytic cells that clean the alveolar surface. ciliated cells that move mucus cuboidal cells that secrete surfactant. columnar cells that secrete mucus - ANS- cuboidal cells that secrete surfactant. An endoscopic examination of the esophagus from a man who had difficulty swallowing showed abnormal growths along more than 2/3 the length of the organ. Biopsy specimens obtained from the top and bottom of esophagus were sent to a histopathologist for analysis. Which tissue layer of the esophagus would be most useful in verifying the locations of the biopsy specimens? Select one: submucosa mucosa lamina propria muscularis externa - ANS- muscularis externa An increase in the numbers of red blood cells that makes the blood too viscous is Select one: hemolytic anemia pernicious anemia. polycythemia. hemorrhagic anemia. - ANS- polycythemia. Approximately how many nephrons are there in each kidney? Select one: a. 100,000 b. 10,000,000 c. 10,000 d. 1,000,000 e. 1,000 - ANS- d. 1,000,000 As respiratory passages branch from trachea to bronchioles, the epithelium gradually changes from: Select one: ciliated, pseudostratified columnar to simple cuboidal simple columnar to simple squamous. stratified squamous to simple squamous simple squamous to ciliated, pseudostratified columnar. - ANS- ciliated, pseudostratified columnar to simple cuboidal C-shaped rings that form the framework of the trachea are composed of: