The opening and closing of ligan-gated ion channels
        
             
        
        
        
Answer:
<h2>ENDOPLASMIC RETRICULUM </h2>
Explanation:
 <em>Thank</em><em> </em><em>uhh</em><em>!</em><em>!</em><em>!</em><em>!</em><em>!</em><em>!</em><em>!</em><em>!</em><em /><em>❤</em>
 
        
             
        
        
        
Answer:
The breathing rate increases.
 
        
                    
             
        
        
        
Answer:
<em>Ana-phase 1 of Meiosis 1 in Male Parent...</em>
Explanation:
It is clear that meiosis is only happening in male due to AAa nondisjuction of dominant AA from male parent. The disjunction is occuring during spermato-genesis during Ana-phase 1 of Meiosis 1 cause it is only possible explanation of tri-somy at Chromosome 1...