The fetal shortcut from the right atrium to the left atrium is the
A. ductus arteriosus.
B. foramen ovale.
C. umbilical artery.
D. ductus venosus.
E. umbilical vein.
Answer: B
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The ischemic phase of the uterine cycle is brought on by vascular spasms, which in turn are a response to what?
A. Ovulation B. Menstruation C. Rising LH level D. Falling progesterone level E. Rising progesterone level
Which water-soluble vitamin cannot be absorbed by the intestinal mucosa unless it has been bound to intrinsic factor?
A) vitamin B12 B) vitamin C C) vitamin B6 D) vitamin D E) vitamin K
An increase in plasma levels of ________ causes a yellowish appearance of the skin and the whites of the eyes. This condition is called ________.
A) biliverdin : jaundice B) bilirubin : renal anemia C) bile : pernicious anemia D) bilirubin : jaundice E) bilirubin : hemostasis
The aponeurosis of the external oblique forms the ________ at its inferior margin.
A. rectus sheath B. linea semilunaris C. medial retinaculum D. linea alba E. inguinal ligament