Q: Which equation best represents the relationship between stimulus intensity and action potential frequency?

$$AP\ freq. \propto \text{Stimulus Intensity}$$

Q: Which equation best describes the relationship between graded potential duration and the duration of neurotransmitter exocytosis?

$$\text{Duration GP} \propto \text{Duration exocytosis}$$

Question 1

Which type of sensory receptor is primarily responsible for detecting steady pressure and texture on the skin?

Accepted Answer

Merkel receptors

Question 2

A stimulus must reach a certain minimum strength to be perceived by the nervous system. What is this minimum called?

Accepted Answer

Threshold

Question 3

Which of the following best describes the process of sensory transduction?

Accepted Answer

Conversion of a stimulus into a signal (action potential) that the CNS can understand

Question 4

Which sensory receptor type is most likely to be activated by mechanical energy such as touch or pressure?

Accepted Answer

Mechanoreceptors

Question 5

A patient presents with a dull, diffuse pain in the viscera. Which type of nerve fibers are most likely transmitting this pain?

Accepted Answer

C fibers

Question 6

Which of the following mechanisms enhances the brain's ability to localize a stimulus by increasing contrast between the center and periphery of a stimulated region?

Accepted Answer

Lateral inhibition

Question 7

If a stimulus is applied repeatedly and rapidly to a sensory receptor, what phenomenon allows graded potentials to summate and potentially reach threshold?

Accepted Answer

Temporal summation

Question 8

Which equation best represents the relationship between stimulus intensity and action potential frequency?

Accepted Answer

$$AP\ freq. \propto 	ext{Stimulus Intensity}$$

Question 9

Which of the following is NOT a function of chemoreceptors?

Accepted Answer

Detecting mechanical pressure

Question 10

A person is unable to distinguish two points on their skin that are close together. Which property of sensory physiology does this test?

Accepted Answer

Tactile acuity

Question 11

Which of the following best describes a rapidly adapting (phasic) receptor?

Accepted Answer

It responds quickly to stimuli but stops relaying action potentials if the stimulus is constant.

Question 12

Which sensory receptor type is responsible for detecting damaging stimuli such as high heat or pressure?

Accepted Answer

Nociceptors

Question 13

Which of the following is TRUE regarding the coding of sensory modality?

Accepted Answer

It is determined by the type of sensory receptor activated.

Question 14

Which equation best describes the relationship between graded potential duration and the duration of neurotransmitter exocytosis?

Accepted Answer

$$	ext{Duration GP} \propto 	ext{Duration exocytosis}$$

Question 15

Which of the following is a characteristic of tonic receptors?

Accepted Answer

They maintain a slowly decaying receptor potential during a constant stimulus.

Question 16

Which sensory receptor type is responsible for detecting wavelengths of light?

Accepted Answer

Photoreceptors

Question 17

A patient with damage to the thalamus may have difficulty processing which aspect of sensory information?

Accepted Answer

Relaying sensory information to the proper region of the cortex

Question 18

Which of the following best explains why dental pain is often poorly localized?

Accepted Answer

Dental afferent fibers have extensive branching and large receptive fields

Question 19

Which of the following is a function of sensory nerves in the skin?

Accepted Answer

Carry signals to the spinal cord

Question 20

Which of the following is most likely to occur if a stimulus falls below threshold due to inhibitory modulation?

Accepted Answer

The stimulus is ignored or not consciously interpreted

Chapter 10: Sensory Physiology – Sensory Receptors and Sensory Processing

Guida di studio - Domande di pratica

Study guide - Flashcard