45. Which of the following forms the margin of a physiologic communication between the right and left atria before birth?O A) Crista supraventricularis (supraventricular crest)O B) Crista terminalisC) Pars membranacea (of the interventricular septum)OD) Septum secundumO E) Truncal ridge

The physiological communication of both the atria is a septum.

Answered: 45. Which of the following forms the…

Fundamentals of Sectional Anatomy: An Imaging Approach

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Chapter2: Head

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45. Which of the following forms the margin of a physiologic communication between the right and left atria before birth?A) Crista supraventricularis (supraventricular crest)B) Crista terminalisC) Pars membranacea (of the interventricular septum)D) Septum secundumE) Truncal ridge
19. A female newborn has hypoxemia. Echocardiography shows communication between the left and right ventricles and a common ventricular outflow tract. The most fikely cause of this abnormality is failure of which of the following embryologic structures to form?A) Muscular ventricular septumB) Septum primumC) Septum secundumD) Truncoconal septa
Mark Section 2: Ram 127 CIT A) Cisterna magna B) Fourth ventricle C) Lateral ventricle CD) Lumbar cistern S 127. A 3-week-old male newborn who was delivered vaginally at 33 weeks' gestation has a bulging anterior fontanel and distended scalp veins. A CT scan of the head shows hydrocephaus. A diagnosis of occlusion of the cerebral aqueduct is made. A shunt will be placed to allow cerebrospinal fluid to be drained to the thoracic cavity. The sturt should be placed in which of the following locations to effectively relieve the increased pressure? E) Superior sagittal sinus ional Board of M Z
53 Examination of a full-term male newborn shows muffled heart sounds on the left and the point of maximal impulse on the right. An x-ray of the chest shows a right-sided cardiac silhouette Which of the following is the most likely cause of this finding? A) Abnormal looping of the primitive heart tube B) Dextroposition of the truncus arteriosus C) Persistent bulbus cordis D) Persistent primitive pulmonary vein E) Persistent right horn of the sinus venosus
40
115. In which of the following tissue does hypoxia elicit vasoconstriction?A) BrainB) Heart C) Liver D) LungE) Skeletal muscle
6. Epicardium is another name for..................
Draw the blood vessels, Arterial supply and Venous drainage, of the a.) Anterior thoracic region b.) the Posterior thoracic region.
6) What is the foramen ovale? A) a condition in which the heart valves do not completely close B) connects the two atria in the fetal heart C) a shallow depression in the interventricular septum Dy the connection between the pulmonary trunk and the aorta in the fetus E.) a hole in the fetal aorta
42.Name of chamber
23. An 85-year-old man has had progressive memory loss and difficulty walking over the past 2 months and occasional urinary incontinence over the past month. When he attempts to walk, he has difficulty starting and feels as if his feet are "glued to the floor." A CT scan shows marked dilation of all four ventricles and minimal cortical atrophy. Which of the following is the most like cause of these findings? A) Malabsorption of cerebrospinal fluid (CSF) by arachnoid granulations B) Obstruction of CSF flow at the cerebral aqueduct C) Obstruction of CSF flow at the interventricular foramen D) Overproduction of CSF by the choroid plexus E) Underproduction of CSF by the choroid plexus
While downhill skiing, Jerry lost control and appeared to hit into a tree, chest first. The ski patrol that are also certified in EMT reported that Jerry was found with his head cocked at a peculiar angle and it looked like he had a fracture at the position of the C2 vertebra. During triage, Jerry appeared cyanotic and apneic. His heart was still beating, but his pulse was fast and thready. a) Explain how the described angle of the head might contribute to the loss of breathing

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