Calcium intake is important for women during pregnancy. If a woman for whatever reason does not get enough calcium in her diet during pregnancy, what is likely to happen to her bone tissue?
A) She will experience severe bone loss due to the loss of estrogen production during pregnancy.
B) She may experience significant bone loss due to both the lack of dietary calcium and the fact that the fetus requires extra calcium, which will be removed from her own bone tissue.
C) The fetus will be born without a skeleton.
D) She may experience some bone loss due to the lack of calcium in her diet, but nothing significant.
Answer: B
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a. ganglion cells b. amacrine cells
c. cones d. rods e. horizontal cells
A(n) ______ inhibitor binds to a site on the enzyme that is not the active site.
Fill in the blank(s) with the appropriate word(s).
A zygote is a fertilized egg formed by an egg and a sperm. The zygote undergoes many mitotic events as it develops into a solid ball of cells (ie, blastomeres) called a blastula. What changes occur in this early cleavage?
A. During the initial stages of cleavage, there is a tremendous increase in the number and size of blastomeres. B. During the initial stages of cleavage, there is no increase in the number of cells of the developing organism, but the size of the cells increases. C. During the initial stages of cleavage, there is a tremendous decrease in the number and size of blastomeres. D. During the initial stages of cleavage, there is a tremendous increase in the number of cells coupled with a decrease in the size of the cells composing the developing organism.
Although Edward Jenner was not the first to use vaccination procedures to prevent disease, he was the first to document such procedures.
a. true b. false