Life: The Science of Biology
11th Edition
ISBN: 9781319010164
Author: David E. Sadava, David M. Hillis, H. Craig Heller, Sally D. Hacker
Publisher: W. H. Freeman
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Chapter 36.1, Problem 2R
Summary Introduction
To review:
The differences and similarities between photoreceptors and hormone receptors.
Introduction:
Signaling in plants is essential for their survival. Receptors are the medium through which plants sense cues from the environment like light, pathogen attack, and temperature. In order to coordinate the activities of the cell in response to such external stimuli, they form certain organic molecules.
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Life: The Science of Biology
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- Which of these photoreceptor cells do not match their function? a) rods - night vision b) stavar - sharp-sighted c) drops - color vision d) No answer text provided.arrow_forwardDescribe the effects of light on the photoreceptors and explain how these effects influence the bipolar cells.arrow_forwardDiscuss the distinct roles of rod cells, cone cells, andrhodopsin in converting a light stimulus into a nerveimpulse.arrow_forward
- When light hits the center of an ON-center receptive field, which of the following processes occur: a. Photoreceptors release more glutamate; bipolar cells release more glutamate; retinal ganglion cells decrease rate of APs. b. Photoreceptors release less glutamate; bipolar cells release less glutamate; retinal ganglion cells decrease rate of APs. c. Photoreceptors release less glutamate; bipolar cells release more glutamate; retinal ganglion cells increase rate of APs. d. Photoreceptors release more glutamate; bipolar cells release more glutamate; ganglion cells increase rate of APs.arrow_forwardThe order in which the cells in the eye process light is __________. A) photoreceptors; ganglion cells; bipolar cells B) ganglion cells; bipolar cells; photoreceptors C) photoreceptors; bipolar cells; ganglion cells D) bipolar cells; photoreceptors; ganglion cellsarrow_forwardEach of the following statements is false. Correct each statement to make it true. a. Activation of rhodopsin depolarizes photoreceptors. b. Activated rhodopsin activates transducin which deactivates cGMP phosphodiesterase. c. Cyclic GMP binds sodium channels, keeping them open, leading to the depolarization of photoreceptor in light.arrow_forward
- What does it mean to say sense organs are transducers? What form of energy do all receptors have as their output?arrow_forwardNight vision begins with the stimulation ofarrow_forwardEven though they are located in the back of the retinal tissue, what is the importance of the rod and cone photoreceptor cells to our sense of sight?arrow_forward
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