If the graded potentials causes depolarization of the membrane, then EPSP (excitatory post synaptic potential) is generated. If the graded potential cause hyperpolarisation of post synaptic membrane, then IPSP (inhibitory post synaptic potential) is generated.
If both the EPSP and IPSP occur close together in time and space, they undergo summation. Thus, neuron integrates the information from the other neuron.
Thus, the blanks can be filled with time; space; integrates.