Bitter taste is elicited by ________.Selected Answer: hydrogen ionsAnswers: acids alkaloidshydrogen ionsmetal ions

Break Down the Problem

1. Identify the compounds or substances that can cause a bitter taste.
2. Analyze the selected answer and the other options provided.

Relevant Concepts

1. The taste sensation is often influenced by certain ions and molecular structures.
2. Acids are typically associated with sour tastes, while alkaloids and metals can impart bitterness.

Analysis and Detail

1. Hydrogen ions (H⁺): Typically relate to acidity and are not primarily responsible for bitterness.
2. Acids: Commonly evoke sour tastes rather than bitterness.
3. Alkaloids: A class of bitter organic compounds, often found in plants, are mainly responsible for the bitter taste.
4. Metal ions: While they can have various tastes, they are not typically known for imparting bitterness.

Verify and Summarize

Upon reviewing the options:

• Hydrogen ions were incorrectly selected for a bitter taste.
• The most appropriate answer that correctly identifies the source of bitterness is alkaloids.

Final Answer

The correct answer is alkaloids.