Imagine that a woman is in the final week of her pregnancy. Her doctor gives her an injection of oxytocin. The likely result of this is that the pregnant woman would _____
A) undergo the loss of oxytocin receptors from her uterine smooth muscle cells
B) stop secreting prostaglandins from the placenta
C) undergo vigorous contractions of her uterine muscles
D) increase the synthesis and secretion of progesterone
E) be prevented from lactation
Answer: C
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It is believed that phototrophy arose approximately 3.3 billion years ago in
A) Bacteria. B) Archaea. C) Eukarya. D) LUCA.
During transcription
a. double-stranded RNA chains are produced. b. the entire DNA molecule is used. c. primase creates an RNA primer to start the RNA strand. d. only one of the two DNA strands acts as a template. e. protein is made from RNA.
Weakened bones, kidney stones, and malfunctioning muscles are symptoms of
a. hyperthyroidism. b. Grave's disease. c. acromegaly. d. hyperparathyroidism. e. Wilson's disease.
Stem cells (unspecialized cells) that develop into bone cells have undergone which type of process?
A. involution B. cellular differentiation C. cellular respiration D. embryonic development