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Questions and Answers
What is the main function of the receptors in the superficial layers of the skin?
What is the main function of the receptors in the superficial layers of the skin?
- To sense global properties of objects
- To detect coarse spatial differences
- To allow for fine tactile discrimination and reading Braille (correct)
- To transmit information from a wide area of skin
How do the receptive fields of receptors in the deep layers of the skin differ from those in the superficial layers?
How do the receptive fields of receptors in the deep layers of the skin differ from those in the superficial layers?
- They can resolve finer spatial differences
- They are larger and only resolve coarse spatial differences (correct)
- They are smaller in diameter
- They are better suited for accurate spatial localization
What is the relationship between two-point discrimination and the receptive field size of mechanoreceptors?
What is the relationship between two-point discrimination and the receptive field size of mechanoreceptors?
- Two-point discrimination is not related to receptive field size
- Larger receptive fields lead to better two-point discrimination
- Smaller receptive fields lead to better two-point discrimination (correct)
- Two-point discrimination varies independently of receptive field size
What is the two-point discrimination threshold on the fingertip compared to the arm?
What is the two-point discrimination threshold on the fingertip compared to the arm?
Which of the following best describes how the receptors in the deep layers of the skin function?
Which of the following best describes how the receptors in the deep layers of the skin function?
Which part of the body has the highest density of touch receptors according to the text?
Which part of the body has the highest density of touch receptors according to the text?
In the somatic sensory cortex, inputs from one type of receptor in specific body parts are organized in columns of neurons that run from the surface to where?
In the somatic sensory cortex, inputs from one type of receptor in specific body parts are organized in columns of neurons that run from the surface to where?
Which regions of the body have much less densely innervated proximal portions, according to the text?
Which regions of the body have much less densely innervated proximal portions, according to the text?
In the somatic sensory cortex, inputs from rapidly adapting (RA) and slowly adapting (SA) receptors project to distinct columns of neurons in which area?
In the somatic sensory cortex, inputs from rapidly adapting (RA) and slowly adapting (SA) receptors project to distinct columns of neurons in which area?
What do alternating columns of neurons in area 3b receive inputs from according to the text?
What do alternating columns of neurons in area 3b receive inputs from according to the text?
Which of the following statements about mechanoreceptors is true?
Which of the following statements about mechanoreceptors is true?
What is the function of the specialized capsule surrounding certain mechanoreceptors?
What is the function of the specialized capsule surrounding certain mechanoreceptors?
Which part of the body has the smallest receptive fields for mechanoreceptors?
Which part of the body has the smallest receptive fields for mechanoreceptors?
How do thermal receptors respond to changes in temperature?
How do thermal receptors respond to changes in temperature?
What is the normal skin temperature at which cold and warmth receptors fire action potentials at a low rate?
What is the normal skin temperature at which cold and warmth receptors fire action potentials at a low rate?
What is the main difference between thermal receptors and mechanoreceptors in terms of firing action potentials?
What is the main difference between thermal receptors and mechanoreceptors in terms of firing action potentials?
At what rate do cold receptors and warmth receptors fire action potentials when the skin temperature is normal?
At what rate do cold receptors and warmth receptors fire action potentials when the skin temperature is normal?
Which type of sensation is NOT recognized by humans according to the text?
Which type of sensation is NOT recognized by humans according to the text?
How do thermal receptors respond to changes in temperature?
How do thermal receptors respond to changes in temperature?
What is unique about the thermal qualities of objects compared to other sensory perceptions?
What is unique about the thermal qualities of objects compared to other sensory perceptions?
Which of the following best describes the function of warm receptors in the skin?
Which of the following best describes the function of warm receptors in the skin?
How do the receptive fields of cold receptors in the skin differ from those of warm receptors?
How do the receptive fields of cold receptors in the skin differ from those of warm receptors?
What is the normal skin temperature range at which cold and warm receptors in the skin fire action potentials at a low rate?
What is the normal skin temperature range at which cold and warm receptors in the skin fire action potentials at a low rate?
Which type of thermal receptor in the skin is most sensitive to decreases in temperature?
Which type of thermal receptor in the skin is most sensitive to decreases in temperature?
How do thermal receptors in the skin respond to changes in temperature?
How do thermal receptors in the skin respond to changes in temperature?
Which of the following best describes how the activity of cold and warmth receptors encodes skin temperature?
Which of the following best describes how the activity of cold and warmth receptors encodes skin temperature?
How does the somatotopic representation of the body in the human cortex differ from the actual topography of the skin?
How does the somatotopic representation of the body in the human cortex differ from the actual topography of the skin?
What is the primary factor that determines the amount of cortical area devoted to representing a particular body region in the somatosensory cortex?
What is the primary factor that determines the amount of cortical area devoted to representing a particular body region in the somatosensory cortex?
What is the main difference in how cold and warmth receptors respond to changes in temperature?
What is the main difference in how cold and warmth receptors respond to changes in temperature?
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