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Campbell Biology In Focus
2nd Edition
ISBN: 9780134203072
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece
Publisher: PEARSON
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Chapter 38.6, Problem 2CC
Summary Introduction
To explain:
What if our brain receives more action potentials when our eyes are exposed to light even though our photoreceptors release more neurotransmitter in the dark.
Introduction:
In humans, the vision starts when the photon of the light enters the eye and via pupil and strike the cone and rod cells. The energy of photon shifts the
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Chapter 38 Solutions
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 IF? If you stimulated a sensory neuron electrically, how would that stimulation be perceived?arrow_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 of the following types of drugs would interfere with vision in this frog? (can choose more than one choice) a. TRPC blocker b.TRMP5 blocker c. CNG channel blocker d.PDE(phosphodiestrase inhibitor)arrow_forwardchannels. Sound waves are most likely to open O a) ligand gated O b) mechanosensitive c) ion gatedarrow_forward
- Considering that all action potentials stimuli? are essentially the same, how do we differentiate visual from auditoryarrow_forwardPlease ASAP. Thanku. What is a receptor (generator) potential? a. A potential that is generated by the sensory stimulus b. A change in the membrane potential of the receptor cell caused by a physical stimulus c. Compound nerve action potential d. A change in the membrane potential of the ascending axonarrow_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_forward
- 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 amplitudearrow_forwardWHAT IF? How might increased branching of an axonhelp coordinate responses to signals communicated bythe nervous system?arrow_forwardOur brain receives more action potentials when our eyes are exposed to light even though our photoreceptors release more neurotransmitter in the dark. Propose an explanation.arrow_forward
- 4 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_forwardPlease answer fast Provide a thorough anatomical description of how the nervous system transforms light energy in the environment into a neural signal that reaches the primary visual cortex (V1, do not go beyond V1). Define the concept of “receptive field” and describe how the receptive fields (or response properties) of the different types of neurons change as information is processed from the retina through primary (V1) visual cortex (be sure to write about retinal ganglion cells in your answer).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
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