亚洲精品亚洲人成在线观看麻豆,在线欧美视频一区,亚洲国产精品一区二区动图,色综合久久丁香婷婷

        

          

              




              

              
	
                
              
	
	

              

              





              	當(dāng)前位置：首頁(yè)   >  英漢互譯  >  英漢雙解細(xì)胞與分子生物學(xué)  >  正文 
              



              
	
              
		
		
              
			
              
				
              acrosome
               基礎(chǔ)科學(xué) 
              
				
              

					 
                      A membrane-bound sac in theanterior head region of a spermatozoon.In amammalian sperm it usually forms a cap overthe nucleus. It contains enzymes that are re-leased on contact with the egg at fertilization,as part of the ACROSOME REACTION.Theenzymes break......（本文共 393 字）      [閱讀本文] >> 
               
			  
				 
              
				 
				
				
              
					開(kāi)通會(huì)員，享受整站包年服務(wù)立即開(kāi)通 >
				
              
				

			
              

			
              
				
               推薦內(nèi)容