Which blood vessel is marked with an X in the image below? Fill in the blank
The Correct Answer is {"dropdown-group-1":"D"}
Correct answer: Superior vena cava (SVC)
The SVC is the large vein that returns venous blood from the head, neck and upper limbs into the superior aspect of the right atrium; anatomically it appears as the large trunk entering the upper right side of the heart in chest models.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Cerebrum: the cerebrum is involved in conscious processing; vomiting reflex is coordinated by brainstem centers.
B. Esophagus: the esophagus is a peripheral organ and a route for vomitus, not the control center for the reflex.
C. Pharynx: the pharynx is an anatomical structure involved in expulsion but not the central integrative center for vomiting.
D. Medulla oblongata: the medulla oblongata (brainstem vomiting center and chemoreceptor trigger zone nearby) integrates visceral sensory input and coordinates the vomiting reflex.
Correct Answer is {"dropdown-group-1":"C"}
Explanation
Correct answer: Interventricular septum (IV septum)
The labeled structure is the interventricular septum, the muscular wall separating the left and right ventricles.
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