A Patient Has a Free T₄ Level of 0

question 11

Multiple Choice

A patient has a free T₄ level of 0.6 ng/dL and a free T₃ of 220 pg/dL. The patient asks the nurse what these laboratory values mean. How will the nurse respond?

• A) "These laboratory values indicate that you may have Graves' disease."
• B) "These results suggest you may have hyperthyroidism."
• C) "We will need to obtain a total T₄ and a total T₃ to tell for sure."
• D) "We will need to obtain a TSH level to better evaluate your diagnosis."

Understand the different types of body symmetry and their biological significance.

Distinguish between coelom and pseudocoel, and understand their developmental and functional implications.

Recognize the importance of cephalization in the evolution of animal body plans.

Identify the roles of different feeding strategies (e.g., herbivory, predation, detritivory) in animal survival and ecosystem dynamics.

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Definitions:

Chi-squared Distribution

A statistical distribution that is used primarily in hypothesis testing and is derived from the sum of squared standard normal deviates.

Proportion

A statistical measure that indicates the fraction of the total number of items in a certain category or characteristic.

Two-tail Test

A statistical test that is used to determine if there is a significant difference between a sample and a particular population mean, where the critical region is split between both tails of the distribution.

Population Proportion

A measure that describes the percentage of a specific characteristic in a population.