QuestionJuly 21, 2025

Choose the substances that can pass through the blood-brain barrier. Nicotine All metabolic waste Some anesthetics All hormones Alcohol

Choose the substances that can pass through the blood-brain barrier. Nicotine All metabolic waste Some anesthetics All hormones Alcohol
Choose the substances that can pass through the blood-brain barrier.
Nicotine
All metabolic waste
Some anesthetics
All hormones
Alcohol

Solution
4.3(243 votes)

Answer

Nicotine, Some anesthetics, Alcohol Explanation 1. Identify substances that can pass through the blood-brain barrier The blood-brain barrier allows certain small, lipophilic (fat-soluble) molecules to pass through. 2. Evaluate each substance - **Nicotine**: Lipophilic and small, so it can pass. - **All metabolic waste**: Generally blocked; not all can pass. - **Some anesthetics**: Lipophilic ones can pass. - **All hormones**: Not all can pass; only some small or specific ones. - **Alcohol**: Small and lipophilic, so it can pass.

Explanation

1. Identify substances that can pass through the blood-brain barrier<br /> The blood-brain barrier allows certain small, lipophilic (fat-soluble) molecules to pass through. <br /><br />2. Evaluate each substance<br /> - **Nicotine**: Lipophilic and small, so it can pass.<br /> - **All metabolic waste**: Generally blocked; not all can pass.<br /> - **Some anesthetics**: Lipophilic ones can pass.<br /> - **All hormones**: Not all can pass; only some small or specific ones.<br /> - **Alcohol**: Small and lipophilic, so it can pass.
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