32 Questions
What is the purpose of the continuous discharge of pain receptors?
To prevent tissue damage by noxious agents
What is the result of gradual closure of Na+ channels?
Decreased receptor potential
What is the term for the ability of the nervous system to discriminate the modality, locality, and intensity of sensations?
Coding of sensory information
What determines the modality of a sensation?
The adequate stimulus to which the receptor is specialized
What is the term for the phenomenon where stimulation of a sensory pathway produces a sensation referred to the location of the receptor?
Law of projection
What is the result of constant stimulation of a receptor?
Loss of stimulus energy in surrounding tissues
What is the function of muscle spindles?
To detect changes in body posture and position
What is the phenomenon observed in patients with amputated limbs?
Phantom pain
What is the term for the state of partial depolarization of the sensory nerve ending?
Receptor potential
What is the primary function of sensory receptors in the body?
To respond to stimuli by generating an action potential
What is the significance of the receptor potential reaching the firing level?
It initiates an action potential
What is a characteristic of the receptor potential?
It is a graded potential
Where are sensory receptors typically located in the body?
At the peripheral ends of sensory neurons
What is the effect of local anesthetics on the receptor potential?
It has no effect on the receptor potential
What type of receptors respond to mechanical stimuli, such as touch and pressure?
Mechanoreceptors
What is the term for the ability of sensory receptors to respond specifically to certain stimuli?
Specificity
What is the term for the decline in the frequency of discharge of action potentials from receptors?
Adaptation
What is the characteristic of rapidly adapting receptors?
They decline rapidly in spite of maintained stimulation
What type of receptors are concerned with detecting changes in temperature?
Thermoreceptors
What is the term for receptors that continue discharging as long as they are stimulated?
Tonic receptors
What is the process by which sensory receptors convert energy changes into electrical impulses?
Transduction
What is the purpose of rapid adaptation of touch receptors?
To avoid unnecessary and excessive sensations
What is the term for the electrical impulses generated by sensory receptors in response to stimuli?
Receptor potential
Which of the following types of receptors are concerned with detecting changes in oxygen content in the blood?
Chemoreceptors
What type of receptors respond to the electromagnetic waves of light?
Electromagnetic receptors
What is the main characteristic of differential sensitivity in receptors?
Responding to only one specific type of stimulus
What is the term for the sensation perceived as a result of stimulation of a receptor?
Modality of sensation
What is the resting membrane potential of a receptor at rest?
-70 mV
What is the result of stimulating a receptor with an inadequate stimulus?
Partial depolarization of the receptor
What is the name of the law that states each receptor is most sensitive to one specific type of stimulus?
Muller's law of specific nerve energies
What is the term for the ability of a receptor to respond to stimuli?
Excitability
What type of stimulus can cause retinal receptors to respond, despite not being their adequate stimulus?
Mechanical stimulus
Learn about sensory receptors, their classification, properties, and adaptation in dental science. Understand receptor potential and coding for sensory information.
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