Which of the following statements is TRUE?
A. The mother and the fetus exchange nutrients by exchanging blood in the placenta.
B. Human chorionic gonadotropin maintains the corpus luteum.
C. Human chorionic gonadotropin levels are the highest at the end of pregnancy.
D. From the time of implantation through delivery, the corpus luteum is the major source of progesterone.
E. Maternal plasma progesterone levels decline in the weeks leading up to the birth of her baby.
B
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Which of the two lungs is larger and wider?
A. The left lung B. The right lung
Which organ is not part of the urinary tract?
A. Urethra B. Ureter C. Kidney D. Urinary bladder E. No exceptions; all of these organs are part of the urinary tract.
The fissure separating the frontal lobe of the cerebrum from the parietal lobe is the ____________________.
Fill in the blank(s) with the appropriate word(s).
Phosphate ions are common cations within the body.
Indicate whether this statement is true or false.