The chorion is
A. cushions and protects the embryo with fluid.
B. the extracellular fluid around the egg.
C. becomes the umbilical cord vessels.
D. the first site of blood cell formation.
E. the fetal half of the placenta.
Answer: E
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The embryo forms from the ________.
A) outer layer of the blastocyst. B) placenta. C) zona pellucida. D) inner cell mass of the blastocyst. E) morula.
Which of the following statements regarding the secretions of immune system cells is TRUE?
A. Type 2 interferons are only secreted by macrophages. B. Interleukin 2 is a cytokine secreted by most immune cells. C. Type 1 interferons are also called interferon-gamma. D. Colony-stimulating factors are secreted mainly by plasma cells. E. Antibodies are produced and secreted by macrophages.
The liver absorbs bilirubin and eliminates it as part of bile
Indicate whether this statement is true or false.
PTH enhances the rapid movement of calcium from the bone fluid into the plasma
Indicate whether the statement is true or false