It's a cell wall, common to some types of cells, like plant cells (one notable component of the cell wall is <span>cellulose, which is exactly where we obtain it from</span>).
        
                    
             
        
        
        
Answer:
There are three types of endocrine cells;
Explanation:
; alpha cells which secrete glucagon, beta cells which secrete insulin, and delta cells which inhibit the secretion on glucagon and insulin: Glucagon increases the blood glucose level by stimulating the liver causing convert Glycogen into Glucose (sugar).
 
        
             
        
        
        
Problem statement is a question that comes to the mind and then stated whereas hypothesis is given after the question has been identified and the background research has been done. 
Problem statement is just a question while hypothesis is an answer to the problem statement that can be proved or disproved. The experiment is carried out after the hypothesis is given in order to validate it. The data of the experiment is studied and the results are interpreted. The results then either validate the given hypothesis. 
 
        
             
        
        
        
The cell keeps molecules balanced inside and out hope i was right have a very nice day