The opening that permits blood to flow between the atria of the fetal heart is (the)
A) ductus venosus.
B) ligamentum arteriosum.
C) foramen ovale.
D) ductus arteriosus.
E) None of the answers are correct.
C) foramen ovale.
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What are the three segments of the small intestine called?
a. duodenum, jejunum, and ileum b. duodenum, septum, and colon c. duodenum, cecum, and ileum d. antrum, jejunum, and fundus e. fundus, ileum, and colon
Hyperventilation (a rapid rate of respiration) will cause:
a. a decrease in carbon dioxide in the blood b. a decrease of pH in the blood c. an increase of pH in the blood d. both a decrease in carbon dioxide in the blood and a decrease of pH in the blood e. both a decrease in carbon dioxide in the blood and an increase of pH in the blood
A person normally has two alleles of a gene because
A. there isn't enough DNA to accommodate more than this. B. DNA only comes in two forms. C. one allele of a gene is carried on each of two homologous chromosomes. D. all genes come in only two varieties.
Which of the following are risk factors for cervical cancer? Select all that apply.
A. Smoking B. Frequent STD infections C. Use of spermicides D. Sexual activity at a young age