When blood calcium levels fall, the ________ secrete a hormone that causes greater calcium release from the bones
Fill in the blank(s) with correct word
parathyroid glands
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If the hydrogen bonds between complementary base pairs were disrupted, which level of organization in DNA would be immediately affected?
a) primary b) secondary c) tertiary d) None of the levels would be affected.
Which of the following is an opportunistic pathogen commonly present in the nasal cavity as a member of the microbiota?
A) Staphylococcus aureus B) Bordetella pertussis C) Legionella pneumophilia D) Pneumocystis jiroveci E) Veillonella species
The primary function of plasma cells is to
A) secrete antibodies. B) remember immune responses. C) secrete cytokines. D) protect phagocytes.
In C4 photosynthesis, where does the carbon in newly synthesized glucose come from?
A) Atmospheric CO2 B) Water C) Chlorophyll D) ATP and NADPH E) Enzymes