An example of a sensory neuron is one that leads from a pain receptor in the finger to the spinal cord. A pin can be pressed against the skin without eliciting a response from the pain receptor. However, if the pin is jabbed into the finger, the pain receptor may be stimulated and the finger would quickly withdrawn through a reflex arc. How do we sense different types of pain (very painful vs. not painful at all)? Using what you understand about threshold potentials and the all-or-none principle, explain how it is possible to sense different levels of pain. question is in bold

An example of a sensory neuron is one that leads from a pain receptor in the finger to the spinal cord. A pin can be pressed against the skin without eliciting a response from the pain receptor. However, if the pin is jabbed into the finger, the pain receptor may be stimulated and the finger would quickly withdrawn through a reflex arc. How do we sense different types of pain (very painful vs. not painful at all)? Using what you understand about threshold potentials and the all-or-none principle, explain how it is possible to sense different levels of pain. question is in bold

Human Physiology: From Cells to Systems (MindTap Course List)

9th Edition

ISBN:9781285866932

Author:Lauralee Sherwood

Publisher:Lauralee Sherwood

Chapter6: The Peripheral Nervous System: Afferent Division; Special Senses

Section: Chapter Questions

Problem 13RE

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A pin can be pressed against the skin lightly and elicit no response from the pain receptor. However, if the pin is jabbed into the finger, the pain receptor may be stimulated and the finger would quickly be withdrawn through a reflex arc. Use what you know about threshold potential and the all-or-none principle to explain different levels of sensation (light touch or pain)
You are recording from a touch receptor in skin. When you stimulate a spot on the skin, the receptor fires continuously until you stop the skin stimulation. Which of the following pieces of information would you need to be able to identify what kind of receptor this is? Group of answer choices Whether the area of skin that can activate this receptor is big or small Whether the receptor sends its output to the somatosensory cortex or not You don’t need any more information; you can identify this receptor just from the information provided Whether the touch receptor is connected to an Alpha-Delta fiber or a C-fiber
Given what you already know about the sensation of pain, what is the expected change in membrane potential when pain is felt by sensory receptors? Select one: a. The nerve impulses increase in strength and lower the threshold potential. b. The nerve impulses occur more frequently, thereby transmitting more action potentials according to the intensity of pain. c. The nerve impulses occur more frequently and prevent neurons from entering the refractory period. d. The nerve impulses increase in strength, thereby making the maximum membrane potential higher than normal.
In the process of sensory coding Recruitment of additional neurons occurs with a weak stimulus in order to make the stimulus stronger. The larger the receptive field of a sensory receptor, the greater the expected acuity and the more accurate the two-point discrimination. Lateral inhibition of neighboring receptors resulting in a relative reduction of action potentials in the neighboring second order neurons would be expected to increase acuity. A receptor potential that remains suprathreshold into the absolute refractory period will result in additional action potentials.
The animal in the image below has 22 spikey appendages radiating from its nose that help it search through soil for small insects to eat. This star organ is highly sensitive to touch and is heavily innervated. Two-point discrimination experiments reveal that some of the appendages have a denser array of sensory receptors than any other appendages. If you were able to examine the somatosensory cortex of this animal, what organization might you expect to see? In your response, make comparisons to sensory systems in other animals.
A pin can be pressed against the skin lightly and elicit no response from the pain receptor how ever, if this pain is jabbed into the finger, the pain receptor may be stimulated and the finger would quickly be withdrawn through a reflex arc. use what you know about threeshold potential and the all-or-none principle to explain different levels of sensation (light touch or pain)
Receptor cells that are neurons with sensory dendrites are faster than receptor cells that are separate from neurons. Why is that, and why might that be important in, for example, the sense of touch versus vision?
Certain cells in the retina respond differently to the direction in which objects move. To understand how cells in the retina respond to different visual stimuli, the activity of a retinal ganglion cell was measured while a square moved across its visual field. Which statement best explains the increases in voltage during the periodic spikes? A. Depolarization of a neuron past a threshold voltage causes sodium channels to close. B. Depolarization of a neuron past a threshold voltage causes sodium channels to open. C. Depolarization of a neuron past a threshold voltage causes potassium channels to close. D. Depolarization of a neuron past a threshold voltage causes potassium channels to open.
Some somatic senses are fast-adapting and others are slow-adapting. Two different types of receptors are listed below. Explain the advantage using an example, for it to be slow or fast. Then explain, using an example, for why it would be harmful if it was the opposite type. Temperature receptor for cold temperatures, fast-adapting 2.Muscle-spindle proprioceptor, slow-adapting
Applying a pressure stimulus to the fluid-filled capsule of an isolated Pacinian corpuscle causes a brief burst of action potentials in the afferent neuron, which ceases until the pressure is removed, at which time another brief burst of action potentials occurs. If an experimenter removes the capsule and applies pressure directly to the afferent neuron ending, action potentials are continuously fired during the stimulus. Explain these results in the context ofadaptation.
In complete darkness, why are there no neural signals being sent to the brain by the retinal ganglion cells? A. glutamate release from rods stimulates the retinal ganglion cells B. glutamate release from rods stimulates bipolar cells which then inhibit retinal ganglion cells C. glutamate release from rods is reduced which then fails to excite retinal ganglion cells D. glutamate release from rods inhibits the bipolar cells which then inhibit retinal ganglion cells
What are some general similarities in how receptive fields are represented by the nervous system? What advantage does this give us with respect to those senses?