These sensory transduction pathways stimulate P/Q-type voltage-gated Ca 2+ channels to control serotonin release onto 5HT 3 receptor-expressing primary afferent nerve fibers that extend into intestinal villi and engage in synaptic-like contacts with EC cells. Our findings establish EC cells as specialized, polymodal stimulus detectors that constitute a direct line of communication between the gut epithelium and specific primary afferent nerve fibers.
• Divides the general sensory receptors into 4 types by the nature of the. stimulus that excites them: - nociceptors (pain) - thermoreceptors (temperature) - chemoreceptors (chemical concentration)...
Proprioceptors (sense the position and movements of the body or its parts) Distribution of Receptors in the Body (3) General senses - receptors widely distributed in the skin, muscles, tendons, etc. Sense of touch, pressure, stretch, heat, cold, and pain.
The sensory receptors on the cilia are proteins, and it is the variations in their amino acid chains that make the receptors sensitive to different odorants. Each olfactory sensory neuron has only one type of receptor on its cilia, and the receptors are specialized to detect specific odorants, so the bipolar neurons themselves are specialized.
Nov 25, 2019 · Generally speaking, the sensory neurons travel up the spinal cord to transmit action impulses to the brain, thalamus, midbrain, or whatever its terminal point need be. There are two types of sensory neurons: somatic sensory neurons, which innervate the skin and skeletal muscles, and the visceral sensory neurons, which innervate the internal organs.
There are receptors that are actually nerve fibers, part of which has been specialized to be sensitive to stimuli (e.g., receptors in the olfactory bulb and free nerve endings in skin), and there are receptors that are other types of cells in close association with nerve fibers (e.g., Merkel's disks in skin and sensory cells in taste buds).
Sensory and Motor Mechanisms AP Biology Crosby High School Sensory Perception Sensory Reception Exteroreceptors Interoreceptors Sensory Transduction Receptor Potential Amplification Transmission Integration Sensory adaptation Sensory Receptors Mechanoreceptors Touch Hair cells Pain receptors (nociceptors) Thermoreceptors Chemoreceptors Gustatory Olfactory Electromagnetic receptors Vision ...