留学360下面为大家搜集整理的是关于SAT2生物词汇中字母A打头的词汇。记忆SAT2生物词汇对于大家更快更好的备考SAT2生物考试有非常重大的影响，下面我们就一起来看看这些关于生物的SAT2词汇详细内容吧。
active site(酶活性部分)
The part of an enzyme that interacts with, or binds to, a substrate.
active transport(主动运输)
The movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration. Because active transport involves moving the molecule against the natural flow of the concentration gradient, the process requires energy.
adaptive radiation(适应辐射) ：同起源生物类群演化成多种不同类型的后代，以适应不同环境的现象
The evolutionary process by which ancestral forms of an organism are diversified through adaptation to new environments.
adenosine triphosphate (ATP/腺苷三磷酸)
The energy storage molecule for the cell. ATP consists of an adenosine molecule bonded to three phosphate groups. Each phosphate bond contains energy; by breaking these bonds, the cell can get the energy it needs for chemical reactions. Cells build ATP during cell respiration, using the raw material of glucose.
adrenal glands(肾上腺)
Two glands, the adrenal cortex(肾上腺皮质，分泌可的松【cortisone】，醛固酮【aldosteron，用于调节渗透，控制钠，钾离子的重新吸收】等激素) and adrenal medulla(肾上腺髓质，分泌肾上腺素【adrenaline】), located on the kidney.