SAT閱讀除了檢測考生的詞匯量外，還要考察考生的理解及判斷的綜合能力。下面天道小編為大家整理一篇關于Dopamine and Learning的SAT閱讀素材文章，供大家學習，大家平時也可以多關注和積累，自己搜集整理一些比較好的SAT閱讀考試素材，幫助自己更好地備考SAT閱讀考試。以下是詳細內容。

每一篇SAT閱讀素材均有其主要觀點或中心主題。典型的圍繞文章主要觀點的問題大多是：在這篇文章中作者的主要目的是什么?這篇文章主要涉及什么問題?這篇文章主要建議是什么?這篇文章總體上想要回答什么問題等。讀完每一篇SAT閱讀素材，我們都要針對SAT素材想想這幾個問題。

Dopamine and Learning

Dopamine is a catecholamine neurotransmitter present in a wide variety of animals, including both vertebrates and invertebrates. In the brain, this phenethylamine functions as a neurotransmitter, activating the five types of dopamine receptors—D1, D2, D3, D4, and D5—and their variants. Dopamine is produced in several areas of the brain, including the substantia nigra and the ventral tegmental area. Dopamine is alsoa neurohormone released by the hypothalamus. Its main function as a hormone is to inhibit the release of prolactin from the anterior lobe of the pituitary.

Dopamine is available as an intravenous medication acting on the sympathetic nervous system, producingeffects such as increased heart rate and blood pressure. However, because dopamine cannot cross the blood-brain barrier, dopamine given as a drug does not directly affect the central nervous system. To increase the amount of dopamine in the brains of patients with diseases such as Parkinson's disease and dopa-responsive dystonia, L-DOPA, which is the precursor of dopamine, can be given because it can cross the blood-brain barrier.

通過對上面的這篇SAT閱讀素材的介紹，大家可以把重點放在詞匯的擴充和文章敘述習慣的了解上。報紙的文章是最貼近美國學術類英語描述順序的，大家可以根據這些內容進行廣泛的積累和借鑒。

SAT閱讀考題重點考察考生的美國大學教材的快速閱讀能力、理解能力及判斷能力。以上就是天道小編為大家整理的關于Dopamine and Learning的SAT閱讀素材的詳細內容，希望對大家有所幫助，天道小編祝大家都能取得理想的SAT閱讀考試成績!