Elevated blood pressure stimulates specialized cells in the heart to release antidiuretic hormone, a peptide hormone
that inhibits renin release.
Indicate whether the statement is true or false.
ANSWER: False - atrial natriuretic factor
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A particular reaction has a negative delta G. However, this reaction takes many years to proceed in the absence of enzyme. Why is this the case?
A. This reaction does not obey the second law of thermodynamics B. This reaction does not proceed spontaneously C. The initial free energy of the reactants is much less than the final free energy of the products D. A certain amount of activation energy is required for the reaction to proceed
Which of the following is not true of eukaryotic signal transduction pathways that result in the regulation of gene expression?
A. The pathway frequently begins with a signal molecule binding to a cell surface receptor. B. The signal is transduced to the nucleus. C. They generally involve the localization of a protein. D. Signal molecules are always transported into the target cellular compartment.
A prokaryotic cell has which of the following?
A. centrioles B. lysosomes C. Plasma membrane D. mitochondria E. Endoplasmic reticulum
The final three-dimensional shape of a single polypeptide is called its ________ structure.
A. primary B. secondary C. tertiary D. quaternary