Which of the following is not one of the extraembryonic membranes surrounding a fetus?
A. Yolk sac
B. Placenta
C. Allantois
D. Chorion
E. Amnion
B. Placenta
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Which is not a function of the placenta in humans?
A. Production of hormones B. Transfer of blood between mother and embryo C. Exchange of respiratory gases D. Transmission of maternal antibodies E. Exchange of nutrients
A lack of vitamin C in the diet results in which of the following?
A. A mutation in the gene for elastin B. A mutation in the gene for collagen C. Abnormally loose collagen fibers, loose joints, and stretchy skin D. Decreased production of the amino acids proline and lysine leading to weak collagen E. Atrophy of skeletal muscle tissue
In most tissues, glucose, a water-soluble substance, crosses capillary walls through
a. water-filled pores b. endothelial cells c. sinusoids d. a and b e. a and c
Which statement best describes a major different between sheep lungs and human lungs?
A) Sheep lungs have more hyaline cartilage than human lungs. B) Sheep lungs have more lobes than human lungs. C) Sheep lungs are divided into right, left, and intermediate lungs. D) Sheep lungs do not have separate right and left pulmonary arteries.