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