Which of the following arteries emerges from ascending aorta?
Left phrenic artery
Left coronary artery
Left subclavian artery
Left intercostal artery
The Correct Answer is B
a. Left phrenic artery: The left phrenic artery arises from the abdominal aorta, not the ascending aorta. It supplies blood to the diaphragm.
b. Left coronary artery: The ascending aorta is the first section of the aorta, the major artery leaving the heart. It branches out to give rise to several arteries, including the left coronary artery, which supplies blood to the left side of the heart muscle.
c. Left subclavian artery: The left subclavian artery arises from the aortic arch, not directly from the ascending aorta. It supplies blood to the left arm and head.
d. Left intercostal artery: The intercostal arteries arise directly from the aorta, not specifically the ascending aorta. They supply blood to the muscles and tissues between the ribs.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
a: Chest cavity compresses the lungs - This is incorrect; during inspiration, the chest cavity expands, not compresses.
b: Length of the thoracic cavity decreases - This is incorrect; during inspiration, the thoracic cavity increases in length as it expands.
c. Diameter of the thoracic cavity increases. When inspiratory muscles contract, such as the diaphragm and external intercostal muscles, the thoracic cavity expands, increasing its volume. This expansion decreases the pressure within the lungs, causing air to flow in (inspiration).
d: Diaphragm rises up in the abdomen - This is incorrect; during inspiration, the diaphragm contracts and moves downward, not upward.
Correct Answer is B
Explanation
a: Electrolytes - Electrolytes are ions such as sodium, potassium, and chloride that play essential roles in various physiological processes but are not directly involved in protecting the body from pathogens.
b. Leukocytes: Leukocytes, also known as white blood cells, are involved in the immune response and protect the body from pathogens such as bacteria, viruses, and fungi.
c: Thrombocytes - Thrombocytes, or platelets, are involved in blood clotting but not in protecting the body from pathogens.
d: Erythrocytes - Erythrocytes, or red blood cells, are primarily involved in transporting oxygen and carbon dioxide and do not play a direct role in immune defense.
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