The receptive field of a neuron in the visual system is the area of the O a. striate cortex within which stimulation can activate the neuron. O b. striate cortex within which stimulation can inhibit the neuron. O c. visual field within which a visual stimulus can influence the firing of the neurom Od. retina in which stimulation can activate the neuron. Oe. either a or b

The receptive field of a neuron in the visual system is the area of the O a. striate cortex within which stimulation can activate the neuron. O b. striate cortex within which stimulation can inhibit the neuron. O c. visual field within which a visual stimulus can influence the firing of the neurom Od. retina in which stimulation can activate the neuron. Oe. either a or b

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Select the options that properly describe the function and features of rods. The absorbance of rhodopsin in the rods is much more sensitive than in the cone opsins. O The absorbance of rhodopsin in the cones is much more sensitive than in the rods opsins. sensitive to bright light conditions. O Rods are sensitive to vision in bright light conditions. O In low light conditions rods perceive color as blue scale. O In low light conditions rods perceive color as gray cale. O sensitive to low light conditions. Rods are sensitive to low light conditions. OA bright blue light would stimulate rods more than cones. O Rods are sensitive to vision in low light conditions. OLow light conditions are viewed in blue scale. Rods are sensitive to bright light conditions.
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At each level of the retina-geniculate-striate system, receptive fields in the foveal area are ___ than those at the periphery Select one: a. both smaller and rounder, for the reasons mentioned in each respective option b. larger, since the fovea mediates low acuity vision c. smaller, since the fovea mediates high acuity vision d. rounder, the receptive fields in the periphery tend to be more square-shaped
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.
What level do we see retinotopic organization in the visual pathways? a. Retina b. Lateral geniculate nucleus c. Primary visual cortex d. a. and b. e. All of the above
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The middle ear consists of the ______ and is important for ______. A hair cells; transduction B cochlea; frequency analysis C ossicles; amplifying the vibrations between the air in the outer ear and the liquid in the inner ear. D All of the above.
how does visual transduction occur in rods? Select one: a. By inhibition: light bleaches the rhodopsin molecules, which closes sodium channels. This hyperpolarizes the rods and increases GABA release. b. By excitation: light inhibits rhodopsin molecules, which blocks sodium ion influx. This depolarizes the rods and causes glutamate release. c. By inhibition: light bleaches rhodopsin molecules, which closes sodium channels. This hyperpolarizes the rods and reduces glutamate release. d. By excitation: light activates rhodopsin molecules, which opens sodium channels. This depolarizes the rods and causes glutamate release
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Please ASAP> Thanku Which of the following statement about the eye is false: a.Retinal ganglion cells are the only cell type in the retina which fire action potential b.Rods are concentrated in the periphery of the retina c.Cones are concentrated in the fovea d.Cones are very sensitive to dim illumination
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