A 50-Year-Old Man Is Seen in the Office for New-Onset

question 97

Multiple Choice

A 50-year-old man is seen in the office for new-onset constipation.  Family history is unremarkable.  Vital signs are within normal limits.  Physical examination reveals normal findings.  Serum laboratory results are as follows: Which of the following is the most likely mechanism causing this patient's low serum phosphate?

• A)Decreased phosphate reabsorption in proximal tubules
• B)Increased bone deposition of phosphorus
• C)Increased fecal loss of phosphorus
• D)Increased phosphate secretion in distal tubules
• E)Transcellular shift of phosphorus into the cells

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Definitions:

Aggregations

Collections or clusters of items, individuals, or particles that come together but are not strictly bound to each other.

Society

A group of individuals belonging to the same species and often closely related; an organized society is an actively cooperating group.

Behavioral Responses

Actions or reactions of an organism in response to external or internal stimuli.

Lek

A small territory in which males compete for females.