________ maintain(s) the healthy balance of Na+ and K+ in body fluid.

A. Cortisol
B. Thyroid hormones
C. Epinephrine
D. Aldosterone


Answer: D

Anatomy & Physiology

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Which of the following is NOT a type of molecular interaction that determines the tertiary structure of a protein?

A. covalent bonds between purines and pyrimidine bases B. ionic bonds C. Van der Waals forces D. covalent bonds between two cysteine amino acids E. hydrogen bonds

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What is the least common but most dangerous form of lung cancer?

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Anatomy & Physiology