Stimulus (physiology) - Wikipedia
WEBIn physiology, a stimulus [1] is a change in a living thing's internal or external environment. This change can be detected by an organism or organ using sensitivity, and leads to a physiological reaction. [2]
13.1 Sensory Receptors – Anatomy & Physiology
WEBA receptor or receptor cell is changed directly by a stimulus. A transmembrane protein receptor is a protein in the cell membrane that mediates a physiological change in a neuron, most often through the opening of ion channels or changes in the cell signaling processes.
12.5 The Action Potential – Anatomy & Physiology
WEBAn action potential is a predictable change in membrane potential that occurs due to the open and closing of voltage gated ion channels on the cell membrane. Electrically Active Cell Membranes. Most cells in the body make use of charged particles (ions) to create electrochemical charge across the cell membrane. In a prior chapter, we described ...
14.1 Sensory Perception - Anatomy and Physiology 2e - OpenStax
WEBThe stimulus causes the sensory cell to produce an action potential that is relayed into the central nervous system (CNS), where it is integrated with other sensory information—or sometimes higher cognitive functions—to become a conscious perception of that stimulus.
Action Potential - The Definitive Guide - Biology Dictionary
WEBJun 9, 2020 · The action potential is an electrical stimulus that might activate another cell to produce a hormone, or to release a neurotransmitter, or move a muscle. Action potentials are anatomical telephone wires and Ethernet cables from the time preceding wireless communications.
12.4 The Action Potential - Anatomy and Physiology 2e - OpenStax
WEBMost cells in the body make use of charged particles, ions, to build up a charge across the cell membrane. Previously, this was shown to be a part of how muscle cells work. For skeletal muscles to contract, based on excitation–contraction …
16.5: The Action Potential - Biology LibreTexts
WEBJul 30, 2022 · Whether it is a neurotransmitter binding to its receptor protein or a sensory stimulus activating a sensory receptor cell, some stimulus gets the process started. Sodium starts to enter the cell and the membrane becomes less negative.
Action potential: Definition, Steps, Phases | Kenhub
WEBNov 3, 2023 · An action potential is defined as a sudden, fast, transitory, and propagating change of the resting membrane potential. Only neurons and muscle cells are capable of generating an action potential; that property is called the excitability.
36.1 Sensory Processes - Biology 2e - OpenStax
WEBIn one, a neuron works with a sensory receptor, a cell, or cell process that is specialized to engage with and detect a specific stimulus. Stimulation of the sensory receptor activates the associated afferent neuron, which carries information about the stimulus to the central nervous system.
36.2: Sensory Processes - Transduction and Perception
WEBOct 31, 2023 · The four major components of encoding and transmitting sensory information include: the type of stimulus, the stimulus location within the receptive field, the duration, and the intensity of the stimulus.
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