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- Occlusion is a. the condition in which object properties don’t change when viewed from different angles. b. the idea that numerous physical stimuli can create the same image on the retina. c. when one object partially covers another. d. when the stimulus on the receptors is ambiguous.When photoreceptors are activated, they synapse with ___________ cells, which then relay to ____________ cells. Question options: A bipolar; amacrine B ganglion; horizontal C bipolar; ganglion D ganglion; bipolarWhich 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.
- Which statement about a center-surround receptive field is false? Select one: a. It can involve an inhibitory response (e.g., to touch) b. It is characterized by a circular center and a doughnut-shaped surround c. It is found only in primary sensory cortex d. It can be mapped by electrophysiological recording techniques e. It can involve an excitatory response (e.g., to touch)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.Which of the following provides an example of serial (rather than parallel) processing in the visual system? a. Visual information is sent from the retina, to the LGN, and then to the visual cortex. b. Rods and cones function simultaneously in the retina. c. The “what” and “where” streams in the visual association cortex work together. d. Processing of motion and shape inform each other.
- In order to see a dim star at night, it is better not to look directly at it. If you see it from the “corner of your eye” and then turn to look at it, it may disappear. Explain how this occurs. Also, you can staredirectly at an object in daylight and continue seeing it, despite the bleaching of photoreceptors. Explain how this is possible.Which one of the following statements about photoreception is true? a. Light detection is initiated by the absorbance of light (a photon) by a photopigment molecule. b. Light detection is synonomous with vision. c. Light detection is always initiated in a rod photoreceptor located in the retina. d. Only light in the visible range (between 400 and 700 nm wavelength) can be detected by animals. e. None of the above answer choices (neither A, nor B, nor C, nor D) is true.Which of the following statements is/are correct about the visual system? A.Input from the left eye is processed exclusively in the right V1 cortex. B. Each point in the visual field is analyzed by both the right and left V1 cortices. C. The right visual hemifield projects to the right LGN. D. Two of the above statements are correct. E. None of the above statements are correct.
- Which of the following is accurate about the maculae of the vestibular apparatus? a. They detect rotational movements of the head. b. They are located in the semicircular canal. c. Nerve signals are generated when the otolithic membrane bends the stereocilia of the hair cells. d. They are the organs of hearing.Then, analyze the following hypothetical situation: Cassey Madrid is a medical assistant at a medical office. He is testing visual acuity in patients for the first time and feels nervous about it. However, Cassey remembered when he did it in his clinical procedures class, so he takes a deep breath and calls the patient, Mr. Saleto. After identifying the patient and welcoming him in the room, Cassey explains the procedure to Mr. Saleto. What should be the distance between Mr. Saleto and the Snellen chart? What instructions can Casey give to Mr. Saleto if he uses glasses? By using the Snellen chart, is Cassey testing distance or near visual acuity? What does it mean if the result of the test is 20/60? What are some nonverbal cues that may indicate that the patient is having difficulty reading the line to which Cassey is pointing?Identify the visual accommodation when focusing on a near object. A. Ciliary muscles contract, suspensory ligaments relax to make lens thick. B. Ciliary muscles relax and pull on the suspensory ligaments to make lens thin. C. Ciliary muscles relax and pull on the suspensory ligaments to make lens thick. D. Ciliary muscles contract, suspensory ligaments relax to make lens thin. . Recognize the sound transmission towards the inner ear. A. Auditory meatus → cochlea → ossicles → oval window → tympanic membrane B. Auditory meatus → tympanic membrane → ossicles → cochlea →oval window C. Auditory meatus → ossicles → tympanic membrane → oval window →cochlea D. Auditory meatus → tympanic membrane → ossicles → oval window →cochlea