Which of the following major events of prenatal development happens first?
A. Bone calcification begins.
B. Meconium accumulates in the intestines.
C. The body is covered with lanugo.
D. The central nervous system begins to form.
E. The eyes are fully open.
Answer: D
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A) testosterone production B) ovum fertilization C) sperm production D) embryo nutrition E) estrogen production
Which is most likely a result of hypersecretion of growth hormone?
A. Dwarfism B. Increased secretion of growth hormone-releasing hormone (GHRH) C. Decreased plasma concentration of IGF-I D. Decreased secretion of somatostatin E. Acromegaly
What is chorionic villi sampling??
A) ?Diagnostic test in which fetal cells are removed from the placenta and examined B) ?Test performed on amniotic fluid to identify potential disorders C) ?Questionnaire used in genetic counseling to create a family history D) ?Test given to newborn infants to identify the presence of phenylketonuria
Which of the following is not true of the anatomy of the stomach?
A. The muscularis contains three layers, whereas most tubular digestive organs contain two. B. The pyloric sphincter regulates the flow of chyme from the stomach into the duodenum. C. The cardia is the region that lies superior to the opening of the esophagus into the stomach. D. The greater curvature is on the lateral and inferior surfaces of the stomach. E. All of these are true of the stomach.