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Chapter 6

Multiple Choice

Multiple Choice

This activity contains 15 questions.

	Which of the following is true regarding sensory receptors?   Sensory receptors are specialized neurons that transduce sensory stimuli. Sensory receptors do not form synapses onto other neurons. Sensory receptors bind transmitter molecules. Sensory receptors do not undergo alteration of membrane potential.

	Which of the following terms do NOT belong together?   Brightness; light intensity Hue, color Saturation, relative light purity Hue; light intensity

	Which of the following would you expect of a species that is active during the night and sleeps during the day?   Members of this species would use color information in their mating rituals. Their fovea would be larger than a species that is active during the day. Their retinas would contain rods, but not cones. This species would have excellent visual acuity.

	Which of the following is unique about the visual transduction process?   Light produces a hyperpolarization of the photoreceptor. The same opsin is used for each type of photoreceptor. Light excites the release of glutamate from the photoreceptors. Photoreceptors do not exhibit changes in membrane voltage.

	Optic nerves join together at the __________, where half of the axons cross to the opposite side of the brain.   calcarine fissure optic disk optic chiasm striate cortex

	Which of the following is true of visual receptive fields?   The receptive field is that aspect of the external visual field that will produce a change in firing rate for a specific neuron. Visual receptive fields are only indicated by increases in firing rate. Receptive fields do not change as a function of visual experience. Receptive fields are similar for neurons of the retina, the LGN, and every area of visual cortex.

	Color mixing refers to   The interactions that occur between rod cells within the retina to different colored lights. Theories of color vision in which the theories have been combined to account for color perception. The mixture of different colored pigments. The mixture of different colored lights.

	People who have the defective color vision termed “protanopia”   Lack blue cones. Have difficulty in sensing short wavelengths. Confuse red and green as a form of yellow. Lack rods in their retinas.

	People with protanopia   are more likely to be male. confuse yellow and blue. see the world in black and white. have no peripheral vision.

	Which of the following is a common feature of neurons in the striate cortex?   The receptive fields of these neurons are sensitive to orientation. These neurons exhibit minimal baseline electrical activity. These neurons provide output to the muscles of the eye. These neurons receive input from layers 7 and 8 of the LGN.

	CO blobs   analyze information from the entire visual scene. were discovered in the modules of prestriate cortex. contain color sensitive neurons. are organized in ovals within a module.

	The _____ layer is found in all mammals.   V4 koniocellular parvocellular magnocellular

	The dorsal stream of the visual association cortex is involved in recognizing _____, whereas the ventral stream is involved in recognizing ___________.   “What” an object is; “where” an object is located Surface features of an object; object movement Movement in an object; the value of an object as food “Where” an object is located; “what” an object is

	Visual agnosia involves   The inability to perceive a stimulus by means of a sensory modality. Damage to the blob portion of the cortical visual modules. Lesions of the connections between striate and extrastriate cortex. Deficient sensory acuity.

	A primary function of Area V5 in primate extrastriate visual cortex is the perception of:   Spatial location. Movement. Patterns. Faces.

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