Answer: D) ALL THE ABOVE
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A hypothesis refers to a suggested illustration for a phenomenon. For a hypothesis to be a scientific hypothesis, there is a need to test it. Upon analysis, a hypothesis can be modified or rejected, but it can never be proved 100 percent accurate.
A hypothesis needs more work by the individual testing it in order to either disprove or confirm it. A working hypothesis refers to a hypothesis, which is tentatively accepted as a foundation for a further research.
Answer:
d. ligand-gated ion channel
Explanation:
When a neurotransmitter released from the pre-synaptic neuron binds to a ligand-gated ion channel on the post-synaptic neuron, that neuron depolarizes and fires.