A Basilar Skull Fracture Which Injures the Hypophyseal Fossa (Seat

question 46

Multiple Choice

A basilar skull fracture which injures the hypophyseal fossa (seat of the sella turcica) of the sphenoid bone will directly affect the release of:

• A) antidiuretic hormone (ADH) also called vasopressin
• B) calcitonin
• C) aldosterone
• D) All of these choices.

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Definitions:

Plasma Membrane

The semi-permeable membrane surrounding the cytoplasm of a cell, which regulates the passage of substances in and out of the cell.

Membrane Receptor

A cell membrane-bound protein or protein complex that transduces signals from outside the cell to the cell's interior, initiating a cellular response.

Isotonic

A solution having the same osmotic pressure as some other solution, typically that of a cell or body fluid, which prevents net movement of water across membranes.

Net Movement

The overall transfer or migration of substances or particles from one location to another, often described in terms of direction and magnitude.