Parathyroid hormone's main function is to
A. increase glucose mobilization during stress or fasting.
B. increase calcium by mobilizing the ion from bone.
C. increase sodium through reabsorption from kidney.
D. increase insulin-like growth factor I and linear body growth.
E. synergize with thyroid hormone in various functions.
B. increase calcium by mobilizing the ion from bone.
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Large ears is a rare trait in a mainland population of mice. A female mice homozygous for very large ears arrives at an island that already contains mice after sneaking onto a boat. This will lead to a population with a higher incidence of big ears than the mainland population because of ____
A. increased mutation. B. a bottleneck effect. C. genetic drift. D. natural selection. E. gene flow.
In the United States, most thyroid disorders are
caused by
a. iodine deficiency. b. iron deficiency. c. an autoimmune disorder. d. insecticides. e. a combination of more than one of these
Species of fossil organisms are morphospecies, which means they are defined on the basis of ________
A) DNA sequence similarities B) mate recognition behaviors C) anatomical features D) ability to interbreed E) the locations where they are found
Which of the following is an accurate description of the plasma membrane?
A) Two layers of phospholipids with a number of proteins embedded within B) One layer of phospholipids with a number of proteins embedded within C) Two layers of proteins with a few phospholipids embedded within D) One layer of proteins with a few phospholipids embedded within