Memory AP Psych TermsVersion en ligne Neurons and the Brain par Alex Trinh Chemical messengers that cross the synaptic gaps between neurons Neurons that carry incoming information from the sensory receptors to the brain and spinal cord Sensory Neurons A fatty tissue layer encasing the axons of some neurons; enables greater transmission speed Neurotransmitter A molecule that, by binding to a receptor site, stimulates a response Interneuron Antagonist A molecule that, by binding to a receptor site, inhibits or blocks a response Myelin Sheath Synapse Agonist Motor Neuron Neurons that carry outgoing information from the brain and spinal cord to the muscles and glands The junction between the axon tip of the sending neuron and the dendrite of the receiving neuron Neuron within the brain and spinal cord that communicate internally and intervene between the sensory inputs and motor outputs