A 34-Year-Old Man Develops Excessive Thirst and Frequent Urination While

question 155

Multiple Choice

A 34-year-old man develops excessive thirst and frequent urination while being hospitalized for multiple injuries following a motorcycle collision.  His urinary osmolality after 4 hours of water restriction is 250 mOsm/L and increases to 700 mOsm/L after administration of antidiuretic hormone.  The patient is started on an appropriate medication, and his symptoms promptly resolve.  Over the next 2 years, multiple attempts are made to wean the patient off the medication, but his symptoms would always return, necessitating the resumption of treatment.  The permanence of this patient's condition is best explained by traumatic damage to which of the following structures?

• A)Anterior pituitary
• B)Hypothalamic nuclei
• C)Kidneys
• D)Posterior pituitary
• E)Thalamic nuclei

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Definitions:

Rights-On Period

A designated timeframe during which shareholders have the right to purchase additional shares at a predetermined price before the offering is open to the public.

Subscription Price

The cost that a customer pays, often on a regular basis, to receive a product or service.

Common Share Price

The price at which a corporation's common shares are bought and sold on the stock market.

Rights-On Period

A defined timeframe during which shareholders can purchase additional shares before the public.