Answer:
C. Sometimes molecules need to move from low to high concentrations.
Explanation:
 
        
                    
             
        
        
        
Answer:
Sartorius and Stapedius muscle
Explanation:
 Sartorius is the longest and stapedius is the thinnest
 
        
             
        
        
        
The correct answer is the insertion. 
<span>Insertion is the attachment site of the muscle end that does move when the muscle contracts. On the other hand, the origin is the attachment site that does not move during contraction (end of the muscle is fixed).</span>
        
             
        
        
        
Answer:
AIDS
Explanation:
AIDS is the most common infectious disease causing lymphocytopenia, which arises from destruction of CD4+ T cells infected with HIV.