Answer:
If a neurotransmitter attaches to a ligand-gated channel and creates a potential that causes the inside of the excitable cell membrane to become less negative, and this potential travels only a short distance before dying out, it is considered to be a <u>Graded or local potential</u>
Explanation:
<em>Graded potentials, also known as local or generator, are generated by an excitatory neurotranmitter, usually a ligan gated channel</em>, they occur at a localized place on the cell and their potentials are smaller (from 1-50mV) and its magnitude depends on the strength of the stimulus.
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Skeletal muscle<span> is </span>most often controlled by conscious thought<span>. The brain sends signals to your nerve endings that tells the skeletal muscles to move</span>
        
                    
             
        
        
        
A reinforcement schedule is a pattern that defines how often a desired response will be reinforced.<span> 
</span>A variable-ratio schedule <span>is a schedule of reinforcement where a response is reinforced after an unpredictable number of responses.</span>
<span>Fixed-interval schedules on the other hand  reinforce behaviors after set time periods.</span>
        
             
        
        
        
Bacteria cells, I believe so.