EBK CAMPBELL BIOLOGY IN FOCUS
2nd Edition
ISBN: 8220101459299
Author: Reece
Publisher: PEARSON
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Chapter 38.4, Problem 3CC
WHAT IF? If you stimulated a sensory neuron of an animal electrically, how would that stimulation be perceived?
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SEQUENCING: Arrange the sequence of events that happen during an action of sensory and motor
systems of animals. Assign numbers, I being the first event until 6 being the last. Write your answers in
your notebook.
10. receptor potential
11. action potential in sensory neuron
12. production of action response
13. receptor transduces energy of stimulus into electrical energy
14. signal transmitted to CNS
15. stimulus (such as light energy)
1. Make a model or draw 3 multipolar neurons. Imagine you had something crawling on your arm.
The first is a sensory neuron, getting its information from the skin and sensing the movement.
The second is an interneuron. It relays information from the first (sensory neuron) to the CNS.
The third is a motor neuron. It begins in the CNS but leads all the way to the muscle, so that you can move the fingers and scratch the area.
On your images/model the "dendrites" should be blue, "axon" should be green and "soma" should be yellow. As you connect them to each other, take notice in which areas are the receiving end, and which are the transmissive ends.
Can measures of sensory acuity be obtained through filaments and biothesiometer? Explan why or why not
Do you tink changing the frequency of the biothesiometer vibrations would affect your measured results? Why?
Which settings affect the frequency of stimulation, which affect amplitude
Chapter 38 Solutions
EBK CAMPBELL BIOLOGY IN FOCUS
Ch. 38.1 - Which division of the autonomic nervous system...Ch. 38.1 - Prob. 2CCCh. 38.2 - When you wave your right hand, what part of your...Ch. 38.2 - People who are inebriated have difficulty touching...Ch. 38.2 - WHAT IF? Two groups of individuals have CNS...Ch. 38.3 - Prob. 1CCCh. 38.3 - Prob. 2CCCh. 38.3 - WHAT IF? If a woman with a severed corpus callosum...Ch. 38.4 - Which one of the five categories of sensory...Ch. 38.4 - Prob. 2CC
Ch. 38.4 - WHAT IF? If you stimulated a sensory neuron of an...Ch. 38.5 - Prob. 1CCCh. 38.5 - Prob. 2CCCh. 38.5 - Prob. 3CCCh. 38.5 - Prob. 4CCCh. 38.6 - Contrast the light-detecting organs of planarians...Ch. 38.6 - Prob. 2CCCh. 38.6 - MAKE CONNECTIONS Compare the function of retinal...Ch. 38 - Patients with damage to Wernickes area have...Ch. 38 - The cerebral cortex does not play a major role in...Ch. 38 - The middle ear converts A. air pressure waves to...Ch. 38 - Prob. 4TYUCh. 38 - Prob. 5TYUCh. 38 - Prob. 6TYUCh. 38 - Prob. 7TYUCh. 38 - SCIENTIFIC INQUIRY Consider an individual who had...Ch. 38 - Prob. 9TYUCh. 38 - FOCUS ON ORGANIZATION In a short essay (100-150...Ch. 38 - Prob. 11TYU
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- What channels are open at 3 if this was recorded on the axon of a sensory neuron? Check all that apply 1. K+ voltage gated channels 2. K+ leak channels 3. Na+ ligand gated channels 4. Na+ stimulus gated channels 5. Na+ voltage gated channels 6. Ca+ voltage gated channels 7. Cl- ligand gated channelsarrow_forwardplease asap. thanku You discover a new species of frog in extremely dark parts of the Amazon rain forest. You hypothesize that this frog detects light using a mechanism similar to mammals. If you are correct, which types of drugs would interfere with vision in this frog?arrow_forwardWrite a Worm neuronal function assay paragraph about a worm neuronal function and find an experiment that could test why the worm may have this worm neuronal function. Such as a worm spiraling. One robust assay of worm behavior is…. “Finish the sentence” and find an experiment that could determine why the worm behavior is this way.arrow_forward
- WHAT IF? Ouabain, a plant substance used in some cultures topoison hunting arrows, disables the sodium-potassium pump.What change in the resting potential would you expect to seeif you treated a neuron with ouabain? Explain.arrow_forward13. Properties of male and female rat nociceptors that respond to painful mechanical stimuli (for instance a sharp tack) were recently studied by Hendrich, et al. (2012). The sensory endings of these nociceptors are found on the foot of the rat. They measured resting membrane potential (RMP) (Fig 2B) and action potential threshold (Fig 2C) in the nociceptors. The results and figure legend are shown below. Use the data (attached) to answer the following questions. a. What category of sensory afferent are the authors studying? b. What reflex(es) does this sensory afferent participate in? c. What conclusions can the authors make based on the data shown in this figure? Speculate on what physiological/behavioral consequences there might be based on the findings.arrow_forward4. Frequency (a) (b) (c) (d) (e) selectivity of the inner hair cells is greatly enhanced by: force generated by the opening of the mechanotransduction cells. channel in inner hair force generated by the opening of the mechanotransduction channel in outer hair cells. myosin motors at the tips of the stereocilia. voltage-dependent changes in length of the outer hair cells. All of the abovearrow_forward
- WHAT IF? Our brain receives more action potentialswhen our eyes are exposed to light even though ourphotoreceptors release more neurotransmitter in thedark. Propose an explanation.arrow_forward1. Protein anions have a charge. However, they do not move across the membrane to produce changes in RMP. Why? 2. At the molecular level, what causes the absolute refractory period? 3. At the molecular level, what is different during the relative refractory period? 4. What would happen if Na+ channels opened and stayed open? 5. How is stimulus intensity coded in APs? 6. What effect does AP frequency have on NT release?arrow_forwardQ4.1. The image below shows a neuron's response to a medium-intensity stimulus. Which of the options underneath it correctly shows a signal for a weaker stimulus? Time (ms) 60 Time (ms) Time (ms) 60 Time (ms) Time ms) 60arrow_forward
- Check Your Understanding 1. In what tissues or organs are Meissner's and Pacinian corpuscles located? What is the specific function of each? 2. Would you expect certain areas of the body to contain more sensory receptors? Why or why not? Did your results in Exercise 1 reinforce your expectations? 3. If the lips were tested for two-point discrimination, what results would you expect? Why?arrow_forward4 The human eye has a biological control system that varies the pupil diameter to maintain constant light intensity to the retina. As the light intensity increases, the optical nerve sends a signal to the brain, which commands internal eye muscles to decrease the pupil's eye diameter. When the light intensity decreases, the pupil diameter increases. Draw a functional block diagram of the light-pupil system indicating the input, output, and intermediate signals; the sensor; the controller; and the actuator. (Non-anonymous question) * (a) (b) (c) FIGURE P1.7 Pupil is shown black; light beam is shown white. a. Light beam diameter is larger than pupil. b. Light beam diameter is smaller than pupil. c. Narrow light beam is illuminated at pupil's edge.arrow_forwardWHAT IF? How might increased branching of an axonhelp coordinate responses to signals communicated bythe nervous system?arrow_forward
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