The celiac trunk divides into two main branches, the gastrosplenic artery and the ________ artery
A) renal
B) lumbar
C) cranial mesenteric
D) gastrohepatic
D
Explanation:
A) The paired renal arteries emerge from the abdominal aorta to supply the kidneys.
B) The six pairs of lumbar arteries arise from the dorsal surface of the aorta and supply the muscles of the dorsal abdominal wall.
C) The cranial mesenteric artery branches off the abdominal aorta just posterior to the celiac trunk.
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Embryonic stem cells growing in a lab dish are bathed in a "cocktail" of chemicals that
cause them to specialize into branching networks of single-nucleated cells that pulsate in unison. This tissue is most likely A) skeletal muscle. B) cardiac muscle. C) epithelial tissue. D) smooth muscle.
Which of the following statements is/are TRUE of the growth of the skeleton?
A) It begins to ossify at six weeks of gestational age. B) All bone formation ceases immediately after the end of adolescence. C) Calcification of bones does not occur until an infant begins to learn to walk. D) All of the answers are correct. E) None of the answers are correct.
Which muscular disorder is characterized by painful muscle spasms?
A. Myasthenia gravis B. Hernia C. Muscular dystrophy D. Cramp
Which term refers to the thinning of the cervix during the birth process?
A. Episiotomy B. Crowning C. Effacement D. Dilation