Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Chapter 44, Problem 8TY
Summary Introduction
Introduction: There are two types of photoreceptor cells in a human eye known as rods and cones. They both contain different types of opsin protein, which is a component of visual pigment. The visual pigment in rods is rhodopsin, whereas, in cones, the visual pigment is photopsins.
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The amount of glutamate release from photoreceptors of the vertebrateeye is highest whena. an animal is in full sunlight.b. an animal is in a completely dark place.c. an animal is in a dimly lit place.d. Na+ channels of the photoreceptors are closed.e. Both a and d are true.
The dissociation of rhodopsin in the rods in response to light causes a.the Na+ channels to become blocked. b.the rods to secrete less neurotransmitter. c.the bipolar cells to become either stimulated or inhibited. d.all of these.
When a single photon from a source of light hits the retina in the eye, it triggers a signal that travels along the optic nerve to the occipital lobe of the brain.
The interaction of a photon with the photoreceptors in the retina first causes the movement of sodium ions into a sensory neuron. What happens after the movement of sodium ions?
a. Sodium ions move out of a sensory neuron.
b. Potassium ions move out of a sensory neuron.
c. Sodium ions move into an interneuron.
d. Potassium ions move into an interneuron.
Chapter 44 Solutions
Biology
Ch. 44.1 - Prob. 1CSCh. 44.2 - Prob. 1CCCh. 44.2 - Prob. 1CSCh. 44.2 - Prob. 2CCCh. 44.2 - Prob. 2CSCh. 44.2 - Prob. 3CCCh. 44.4 - Prob. 1CCCh. 44.5 - Prob. 1CSCh. 44.5 - Why is red-green color blindness rare in females?Ch. 44.5 - Prob. 2CS
Ch. 44.5 - Prob. 2CCCh. 44.6 - Prob. 1EQCh. 44.6 - CoreSKILL Of the two hypotheses explaining how...Ch. 44.6 - Prob. 3EQCh. 44.6 - Prob. 1CCCh. 44 - The process in which incoming sensory stimulation...Ch. 44 - Prob. 2TYCh. 44 - ______blanksense pain; ______blank sense heat or...Ch. 44 - Prob. 4TYCh. 44 - In which process(es) are hair cells involved? a....Ch. 44 - Prob. 6TYCh. 44 - In the mammalian eye, light from near or far...Ch. 44 - Prob. 8TYCh. 44 - Prob. 9TYCh. 44 - The stimulation for olfaction involves odorant...Ch. 44 - Prob. 1CQCh. 44 - Prob. 2CQCh. 44 - Prob. 3CQCh. 44 - Discuss the several types of sensory stimuli that...Ch. 44 - Prob. 2COQ
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- Select the statement that best describes how the nervous system encodes sensory input. a. Neural coding permits precise assessments of the absolute intensity of a stimulus. b. Neural circuits in sensory systems are always convergent. c. The neural representation of sensory input is an exact replica of the physical world. d. The neural representation of sensory input emphasizes some sensory qualities over others. e. Each neuron must be optimized to code both resolution and sensitivityarrow_forwardWhich of the following descriptions of photoreceptors in the eye is NOT correct? a. Cones are concentrated in the fovea of the retina and function to detect colours. b. Rods are concentrated at the periphery and function well in dim light. c. Rods are concentrated in the fovea of the retina and function well in dim light. d. Rods are sensitive to light and register black and white. Cones detect colours.arrow_forwardWhen a single photon from a source of light hits the retina in the eye, it triggers a signal that travels along the optic nerve to the occipital lobe of the brain. The interaction of a photon with the photoreceptors in the retina first causes the movement of sodium ions into a sensory neuron. What happens after the movement of sodium ions? Select one: a. Sodium ions move out of a sensory neuron. b. Potassium ions move out of a sensory neuron. c. Sodium ions move into an interneuron. d. Potassium ions move into an interneuron.arrow_forward
- Compare the values below. Which is greater, or are the two values equal? A. Size of receptor potential in a hair cell during a weak (quiet) stimulus. B. Size of receptor potential in a hair cell during a strong (loud) stimulus. O A is greater than B O B is greater than A O the values are equalarrow_forwardWhich sensory processing principle listed below best explains why we detect heat sensation when eating foods that contain capsaicin, the molecule found in chili peppers. a. Parallel processing. b. Labeled lines. c. Topographic maps. d. Efferent modulation . e. Neural plasticity.arrow_forwardAt a normal NMJ, action potentials in the skeletal muscle cell can be blocked directly by? A. Curare, which inhibits nicotinic receptors. B. Atropine, which inhibits muscarinic receptors. C. Physostigmine, which inhibits ACHE. D. AP5, which inhibits NMDA receptors. E. Pentobarbital, which enhances the function of GABA on GABAA receptors.arrow_forward
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