Which cells of the pancreatic islets produce glucagon?
A) delta cells
B) F cells
C) beta cells
D) alpha cells
D
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Ossification of the ends of long bones ________
A) is a characteristic of intramembranous bone formation B) involves medullary cavity formation C) takes twice as long as diaphysis ossification D) is produced by secondary ossification centers
________ considers developmental events that occur in the first two months after fertilization.
Fill in the blank(s) with the appropriate word(s).
Which of the following statements is true of metaphase I of meiosis I?
A) Joined homologous pair uniformly line up on the equatorial spindle with chromosome one at the top and chromosome 23 on the bottom. B) Tetrads align randomly on the spindle equator with all the maternal homologs on one side and all the paternal homologs on the opposite side. C) Homologous pairs align randomly on the spindle equator with a mix of paternal and maternal homologs destined for each of the daughter cells. D) The sister chromatids line up randomly on the spindle equator with some maternal and paternal chromatids on both sides of the equator.
When the amine (NH2) group is stripped off of an amino acid, this amine group is converted to ________.
A. lactate B. glucose C. ammonia D. urea E. glycerol