Sensory Receptors in Dentistry

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What is the purpose of the continuous discharge of pain receptors?

To stimulate muscle spindles
To detect changes in body posture
To prevent tissue damage by noxious agents (correct)
To transmit sensory information to the CNS

What is the result of gradual closure of Na+ channels?

Increased frequency of discharge
Increased receptor potential
No change in receptor potential
Decreased receptor potential (correct)

What is the term for the ability of the nervous system to discriminate the modality, locality, and intensity of sensations?

Modality discrimination
Accommodation of afferent nerve fibers
Locality discrimination
Coding of sensory information (correct)

What determines the modality of a sensation?

The adequate stimulus to which the receptor is specialized (A) Signup and view all the answers

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 (D) Signup and view all the answers

What is the result of constant stimulation of a receptor?

Loss of stimulus energy in surrounding tissues (A) Signup and view all the answers

What is the function of muscle spindles?

To detect changes in body posture and position (D) Signup and view all the answers

What is the phenomenon observed in patients with amputated limbs?

Phantom pain (A) Signup and view all the answers

What is the term for the state of partial depolarization of the sensory nerve ending?

Receptor potential (A) Signup and view all the answers

What is the primary function of sensory receptors in the body?

To respond to stimuli by generating an action potential (D) Signup and view all the answers

What is the significance of the receptor potential reaching the firing level?

It initiates an action potential (D) Signup and view all the answers

What is a characteristic of the receptor potential?

It is a graded potential (B) Signup and view all the answers

Where are sensory receptors typically located in the body?

At the peripheral ends of sensory neurons (B) Signup and view all the answers

What is the effect of local anesthetics on the receptor potential?

It has no effect on the receptor potential (C) Signup and view all the answers

What type of receptors respond to mechanical stimuli, such as touch and pressure?

Mechanoreceptors (A) Signup and view all the answers

What is the term for the ability of sensory receptors to respond specifically to certain stimuli?

Specificity (B) Signup and view all the answers

What is the term for the decline in the frequency of discharge of action potentials from receptors?

Adaptation (A) Signup and view all the answers

What is the characteristic of rapidly adapting receptors?

They decline rapidly in spite of maintained stimulation (C) Signup and view all the answers

What type of receptors are concerned with detecting changes in temperature?

Thermoreceptors (A) Signup and view all the answers

What is the term for receptors that continue discharging as long as they are stimulated?

Tonic receptors (D) Signup and view all the answers

What is the process by which sensory receptors convert energy changes into electrical impulses?

Transduction (B) Signup and view all the answers

What is the purpose of rapid adaptation of touch receptors?

To avoid unnecessary and excessive sensations (A) Signup and view all the answers

What is the term for the electrical impulses generated by sensory receptors in response to stimuli?

Receptor potential (D) Signup and view all the answers

Which of the following types of receptors are concerned with detecting changes in oxygen content in the blood?

Chemoreceptors (D) Signup and view all the answers

What type of receptors respond to the electromagnetic waves of light?

Electromagnetic receptors (A) Signup and view all the answers

What is the main characteristic of differential sensitivity in receptors?

Responding to only one specific type of stimulus (D) Signup and view all the answers

What is the term for the sensation perceived as a result of stimulation of a receptor?

Modality of sensation (B) Signup and view all the answers

What is the resting membrane potential of a receptor at rest?

-70 mV (C) Signup and view all the answers

What is the result of stimulating a receptor with an inadequate stimulus?

Partial depolarization of the receptor (C) Signup and view all the answers

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 (B) Signup and view all the answers

What is the term for the ability of a receptor to respond to stimuli?

Excitability (A) Signup and view all the answers

What type of stimulus can cause retinal receptors to respond, despite not being their adequate stimulus?

Mechanical stimulus (D) Signup and view all the answers