QQuestionAnatomy and Physiology
QuestionAnatomy and Physiology
"Select the true statements about dopamine.
L‑dopa is converted to dopamine once inside the brain.
Dopamine cannot cross the blood–brain barrier.
Dopamine deficiency causes Parkinson's disease.
Administration of dopamine can treat the symptoms of Parkinson's disease.
Dopamine is a membrane transport protein located in the blood–brain barrier."
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Answer
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Step 1: Identify the true statements about dopamine.
L-dopa is a precursor to dopamine, and it can cross the blood-brain barrier. Once inside the brain, L-dopa is converted to dopamine. Therefore, the statement "L-dopa is converted to dopamine once inside the brain" is true.
Step 2:
Dopamine itself cannot cross the blood-brain barrier, so the statement "Dopamine cannot cross the blood–brain barrier" is true.
Final Answer
The true statements about dopamine are: - L-dopa is converted to dopamine once inside the brain. - Dopamine cannot cross the blood-brain barrier. A more accurate statement regarding Parkinson's disease is: - A deficiency in dopamine in specific areas of the brain contributes to the development of Parkinson's disease.
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