This is a closed book, closed notes exam. Read each question carefully. If you have questions, raise your hand. Do not use more than the allotted space.
Electrical synapses are faster, more direct and often more efficient than chemical synapses.
Binding of neurotransmitter molecules to their receptors can open ion channels producing a large membrane current. Thus, chemical synapses can greatly amplify the signal. Also, because transmission of the signal depends upon specific interactions of transmitters with their receptors, multiple signals can be sent. You are recording from a muscle cell while directly stimulating it with a current electrode. The muscle will stop contracting in response to the current stimulus because ATP is required at two steps during excitation and contraction.