The direction of blood flow through the heart is best described by which of these?
Aorta- right atrium right ventricle lungs pulmonary vein→ left atrium → left ventricle → vena cava
Vena cava- right atrium - right ventricle - lungs - pulmonary artery - left atrium - left ventricle
Right atrium → right ventricle → pulmonary vein→ lungs → pulmonary artery → left atrium → left ventricle
Right atrium → right ventricle → pulmonary artery → lungs pulmonary vein→ left atrium → left ventricle
The Correct Answer is D
A. Aorta- right atrium-right ventricle-lungs-pulmonary vein→ left atrium→ left ventricle→ vena cava: This sequence is incorrect because blood does not flow from the aorta to the right atrium; rather, the aorta carries oxygenated blood from the left ventricle to the body. The vena cava brings deoxygenated blood into the right atrium.
B. Vena cava-right atrium-right ventricle-lungs-pulmonary artery-left atrium-left ventricle: This sequence is incorrect because the blood does not flow from the lungs directly into the left atrium via the pulmonary artery; instead, blood from the lungs returns to the left atrium via the pulmonary veins.
C. Right atrium → right ventricle → pulmonary vein → lungs → pulmonary artery → left atrium → left ventricle: This sequence is incorrect because the pulmonary veins carry oxygenated blood from the lungs to the left atrium, not to the right ventricle.
D. Right atrium → right ventricle → pulmonary artery → lungs → pulmonary vein → left atrium → left ventricle: This is the correct sequence of blood flow through the heart. Blood flows from the right atrium to the right ventricle, then to the pulmonary artery, which carries it to the lungs for oxygenation. After oxygenation, blood returns to the left atrium via the pulmonary veins and then flows into the left ventricle before being pumped out to the body through the aorta.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Whisper a set of random numbers and letters, and then ask the patient to repeat them: The whispered voice test is a simple and reliable screening method for hearing loss. The nurse stands about 2 feet behind the patient, whispers a series of random numbers or letters, and asks the patient to repeat them. This helps assess high-frequency hearing loss.
B. Shield the lips so that the sound is muffled: While the test is performed without the patient seeing the nurse’s lips to prevent lip reading, deliberately muffling the sound is unnecessary and may alter the accuracy of the assessment.
C. Stand approximately 6 feet away to ensure that the patient can really hear at this distance: The whispered voice test is conducted at a standard distance of about 2 feet, not 6 feet. Increasing the distance may make the test unreliable.
D. Ask the patient to place his or her finger in their ears to occlude outside noise: The test should be performed in a quiet environment, but instructing the patient to occlude their ears is unnecessary. Instead, the nurse tests one ear at a time by covering the opposite ear.
Correct Answer is B
Explanation
A. Maxillary sinuses reach full size after puberty: While maxillary sinuses continue to grow throughout childhood, they are present at birth and reach adult size during late adolescence. The frontal and sphenoid sinuses, rather than the maxillary, experience more significant postnatal development.
B. Maxillary and ethmoid sinuses are the only sinuses present at birth: At birth, only the maxillary and ethmoid sinuses are developed. The frontal and sphenoid sinuses begin to develop later in infancy and childhood, with full maturation occurring in adolescence.
C. Frontal sinuses are fairly well developed at birth: Frontal sinuses do not develop until around 7 to 8 years of age and continue growing into adolescence. They are absent or rudimentary in newborns.
D. Sphenoid sinuses are full size at birth: The sphenoid sinuses begin developing around 2 to 3 years of age and continue growing into late childhood and adolescence. They are not present at birth.
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