A Goiter Results from Low Dietary Iodine Levels

question 38

Multiple Choice

A goiter results from low dietary iodine levels

• A) because the hypothalamus cannot be inhibited without iodine.
• B) because ADH levels rise controllably.
• C) due to the activity of the anterior pituitary gland.
• D) as glucagon levels elevate.
• E) because thyroxine cannot be made, which results in high levels of TSH.

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Definitions:

Nerve Endings

The terminal parts of nerve cells that make synaptic connections with other nerve cells, muscles, or glands.

Nervous System

An extensive network of specialized cells that communicate information about an organism's environment and its own body in order to regulate its functions.

Sensory Adaptation

The process by which sensory receptors become less sensitive to constant or unchanging stimuli over time, allowing individuals to focus on changes in their environment.

Just Noticeable Difference

The smallest difference in stimulation that can reliably be detected by an observer.