Describe characteristics of receptors at the synapses. Select all that apply.Multiple select question.They only open in response to voltage changes across the membraneThey are ligand activated receptorsAll receptors are gated ion channelsOnly specific molecules are able to bind to the receptors

The characteristics of receptors at the synapses include:

1. They are ligand activated receptors: This means that these receptors are activated by specific chemical signals, or ligands, that bind to them.

2. Only specific molecules are able to bind to the receptors: Each receptor at a synapse is designed to bind with a specific molecule or a group of related molecules. This ensures that the correct signals are sent and received by the neurons.

3. Not all receptors are gated ion channels: While many receptors at the synapses are indeed gated ion channels, which open or close in response to specific signals, not all of them are. Some receptors, for example, work by activating intracellular signaling pathways rather than by directly controlling ion flow across the membrane.

4. They do not only open in response to voltage changes across the membrane: While some receptors, known as voltage-gated ion channels, do open in response to changes in electrical potential across the neuron's membrane, others, known as ligand-gated ion channels, open in response to the binding of a specific ligand or chemical signal.