Which of the following molecules act as second messengers?
A. cAMP
B. Ca2+
C. Inositol triphosphate
D. All of the above
Answer: D. All of the above
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The wall of an artery contains ____________________ and ____________________ connective tissue fibers
Fill in the blank(s) with correct word
The function of the ________ is to produce ribosomal RNA.
A. centromere B. chromatin C. nucleolus D. lysosomes
What would happen to the blood PCO2 of a patient who has an airway obstruction?
A) Blood PCO2 would increase, resulting in respiratory acidosis. B) Blood PCO2 would increase, resulting in respiratory alkalosis. C) Blood PCO2 would decrease, resulting in respiratory acidosis. D) Blood PCO2 would decrease, resulting in respiratory alkalosis. E) Blood PCO2 would increase, resulting in metabolic acidosis.
Which structure is an important site for early blood cell formation and is the first of the extraembryonic membranes to form?
A. Chorion B. Zona pellucida C. Yolk sac D. Amnion