In dehydration synthesis reactions, compounds
A) lose water molecules.
B) gain water molecules.
C) convert water molecules to hydrogen and oxygen.
D) convert hydrogen and oxygen to water.
E) gain electrons.
A
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Irregular and unpredictable vasoconstriction in the fingertips and toes (such as occurs in Raynaud's syndrome) would most likely be caused by
A) both local and systemic defects in sympathetic response controlling muscle tone in vessel walls. B) insufficient vasomotor responses by the sympathetic nervous system. C) defective control of blood pressure by both the sympathetic and parasympathetic divisions. D) irregular and unpredictable responses by the parasympathetic division. E) None of the answers are correct.
In an experiment, a researcher infuses a solution of conjugated bile acids into the portal vein of a rat such that their normal concentration is approximately doubled
He collects samples of hepatic bile from the rat before and after the infusion. Before the infusion, the concentrations of bile acids (BA), phosphatidylcholine (PC), and cholesterol (chol) are 30, 9, and 3 units per mL. What would be the predicted concentrations of PC and chol in the bile following the BA infusion? A. PC: 9; chol: 3 B. PC: 18; chol: 3 C. PC: 9; chol: 6 D. PC: 18; chol: 6 E. PC: 3; chol: 9
Metabolism is a term that describes ________.
A) all work done by a living organism. B) the energy released from chemical bonds in living cells. C) the extraction of nutrients from biomolecules. D) all chemical reactions that take place within an organism. E) only chemical reactions that release ATP from living cells.
Which applies to synergist muscles?a: Assist the agonistb: Assist the antagonistc: May stabilize the point of origind: May contribute to tension at the insertion sitee: Most useful at the end of a movement
A. b, c, d B. a, c, d, e C. b, c, e D. a, c, d E. b, c, d, e