Question

Mrs. Johnson does goes in to visit her doctor because of some health issues that she has been having. One of the many tests that were run on Mrs. Johnson revealed that she had no circulating concentrations of vasopressin. The doctor does a further analysis of her hypothalamus and posterior pituitary to see what might be causing this problem. Predict which of the following might explain Mrs. Johnson's condition.Choose the best answer.The neuronal cell bodies in the hypothalamus are damaged.The cells in the posterior pituitary that release vasopressin are inactive.The rate of blood flow through the posterior pituitary has increased.All of the listed answer are possible explanations for the observation.

Answer 1

Answer:

The correct answer is: The neuronal cell bodies in the hypothalamus are damaged.

Explanation:

Vasopressin, also known as antidiuretic hormone, is a peptide hormone produced in the neurons of the hypothalamus. Then, through these neurons axons, it travels to the posterior pituitary where it will be stored in vesicles and released when extracellular fluid decreases and osmolality increases.

Vasopressin main function is to stimulate the kidney to reabsorb solute-free water when osmolality increases.  Also, it increases peripheral vascular resistance due to the constriction of arterioles, and as a result, it raises blood pressure.