The enamel of the mammalian tooth is composed of crystals of
A) Calcium carbonate.
B) Calcium fluoride.
C) Calcium phosphate.
D) Calcium chloride.
Answer: C
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The ________ is the inner layer of the kidney that communicates with the calcyes.
Fill in the blank(s) with the appropriate word(s).
Which of the following occurs when insulin molecules bind to their receptors on target cells?
A. increased mRNA synthesis in the target cells B. minimal uptake of glucose by target cells C. phosphorylation of proteins in the plasma membrane in the target cells D. increased numbers of active transport molecules for glucose E. phosphorylation of proteins in the plasma membrane in the target cells and increased numbers of active transport molecules for glucose
In skeletal muscle cells, calcium initiates contraction by binding to
A. actin. B. tropomyosin. C. the thick filament. D. myosin. E. troponin.
The limbic system is not a separate structure, but a(n) ____________________ system consisting of a ring of forebrain structures that surround the brain stem
Fill in the blank(s) with correct word