Psychology 2220A/B Study Guide - Final Guide: Smooth Muscle Tissue, Thermoregulation, Motor Coordination

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Sensory receptor organs are organs that are specialized to detect a certain stimulus. The receptor cells within the organ convert the stimulus into an electrical signal. Adequate stimulus is a stimulus that the specific organ is adapted to. Receptor cells convert energy into a change in electrical potential across its membrane. The changing of the signal is called sensory transduction. Receptor cells are transducers that convert energy that leads to sensory perception. Receptors and channels for different senses are independent. All senses use action potentials as their source of energy. Receptor potentials are local changes in membrane potential. Labeled lines brain recognize distinct senses based on the actions potentials that travel along each nerve tract. Pacinian corpuscle is a receptor in the skin that detects vibration and pressure. The stimulus produces an electrical potential, and when the potential is large enough the receptor reaches threshold and generates an action potential.

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