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 B
Explanation
a. Vas deferens: This is a tube that transports sperm from the epididymis to the ejaculatory ducts but does not form the bulk of the testis.
b. Seminiferous tubules: These tubules are where sperm production (spermatogenesis) occurs and constitute the majority of the testicular mass.
c. Seminal vesicles: These are glands that produce seminal fluid and are not part of the testis.
d. Corpus cavernosum: This is erectile tissue found in the penis, not in the testis.
Correct Answer is B
Explanation
a: Receptor - Receptors are proteins that bind to signaling molecules (ligands) outside the cell and initiate cellular responses but do not typically facilitate ion movement.
b. Channel-Integral membrane proteins called ion channels create pores in the cell membrane, allowing specific ions to pass through, thus facilitating ion movement into or out of the cell.
c: Ligand - Ligands are signaling molecules that bind to receptors, activating them, but they do not facilitate ion movement.
d: Peripheral - Peripheral proteins are found on the surface of the cell membrane but are not typically involved in creating ion channels
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