Lecture 75 Flashcards
Sensory receptors that detect stimuli originating from within the body, such as changes in blood pressure, pH, or the distension of organs.
Interoceptors
Sensory receptors that detect stimuli from the external environment, such as touch, temperature, and light
exteroceptors
The specific type of stimulus to which a sensory receptor is most sensitive. For example, photoreceptors in the eye are most sensitive to light
Adequate stimulus
The type or category of sensory information detected by a receptor, such as vision, light, touch, hearing, or pain.
Modality
The process by which a sensory receptor converts a physical or chemical stimulus into an electrical signal (action potential)
Signal transduction
The minimum stimulus intensity required to generate an action potential in a sensory receptor
threshold
Graded electrical potentials produced in sensory receptors in response to a stimulus. If the generator potential reaches the threshold, it triggers an action potential
Generator potentials
The concept that specific sensory modalities are encoded by distinct pathways from the receptor to the brain, ensuring that the modality and location of a stimulus are accurately interpreted
Labeled line coding
The specific area or region of the sensory surface (e.g., skin, retina) from which a sensory neuron can be activated. Smaller receptive fields allow for finer sensory discrimination
Receptive feilds
The process by which weak stimuli are amplified during signal transduction, allowing the sensory system to detect and respond to subtle changes in the environment
Signal amplification
respond briefly to the onset of a stimulus (e.g., Pacinian corpuscles
Rapidly adapting receptors
respond throughout the duration of a stimulus (e.g., muscle spindles).
Slowly adapting receptors
Special examination of specimens (blood, urine, feed or soil samples) is used to determine what
determines specific cause of lesion
The input for sensory is a total stimulus energy which means it has met?
threshold
Once an input comes into a sense organ peripheral filtering mechanisms begin and an adequate stimulus is sent to?
sensory transducer
Convert something from one thing to something else.
transduction
sensory apparatus goes to _______ and then to an electrical signal
mechanoreceptor
once the sensory has met its receptor potential it goes to a spike-encoding mechanism and afferent action potentials which is a
all of none signal
_______ has to reach threshold and for almost all they are associated with Na/ Channels
Generator potential graded
T/F: All transduction mechanisms have a threshold
T
Modality is _______ is being transduced and tell you _______ _______ is being used
receptor
A weak stimulus causes a _______ and vice versa
weak reaction
_______ are examples of interoceptors?
baroreceptors, chemoreceptors
interoceptors are _______ active
tonically
