The pyloric sphincter is located between the
a. esophagus and stomach.
b. oral cavity and esophagus.
c. large intestine and rectum.
d. small intestine and large intestine.
e. stomach and small intestine.
E
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What happens to the lungs if intrapleural pressure equals or increases above atmospheric pressure?
A) burst B) collapse C) inhalation D) overinflation
Which of the following leukocytes is the most abundant in circulating blood?
A. Lymphocytes B. Neutrophils C. Basophils D. Monocytes
Which plexus gives rise to the sciatic nerve?
A. Coccygeal B. Cervical C. Lumbar D. Sacral E. Brachial
Under the influence of the trophoblast, maternal blood vessels in the endometrium
A) disappear. B) attach to the inner cell mass. C) break down and form lacunae. D) form a capillary network in the trophoblast. E) increase in size and penetrate the blastocyst.