Hello there.
<span>Interactions between actin and myosin filaments of the sarcomere are responsible for
</span><span>(c) muscle contraction
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Equilibrium: Equilibrium is a state in which opposing forces or influences are balanced.
Hope this helps :)
 
        
             
        
        
        
Answer:
there are 4: paracrine signaling, autocrine signaling, endocrine signaling, and synaptic signaling
Explanation:
paracrine:cells that are near one another communicate through the release of chemical messengers 
autocrine: a cell signals to itself, releasing a ligand that binds to receptors on its own surface 
endocrine:When cells need to transmit signals over long distances, they often use the circulatory system as a distribution network for the messages they send. 
synaptic: nerve cells transmit signals. The junction between two nerve cells where signal transmission occurs.