What effect does sympathetic nervous system stimulation have on pupil diameter? It is known that one's diameter of the pupil's increases when telling a lie. Offer an explanation.
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What effect does sympathetic nervous system stimulation have on pupil diameter? It is known that one's diameter of the pupil's increases when telling a lie. Offer an explanation.
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- Which of the following statements about the eye is/are TRUE? Group of answer choices Parasympathetic (sympathetic) innervation of the sphincter pupillae stimulates pupil dilation. Photoreceptors in the retina are of two types: rods and cones. Eye color is determined by that of the iris. A. Light striking the fovea centralis goes unnoticed and is commonly called the "blind spot". B. Light entering the eye passes through the cornea, anterior chamber, pupil, lens, and vitreous body, from outer to inner.(posterior only) C. Movement of the extrinsic muscles of the eye is controlled by the autonomic (optic nerve) nervous system. D. Because lacrimal fluid ultimately enters into the nasal cavity, people often sniffle when they cry. F. The adjustability of the lens allows the eye to focus on nearby objects.The discharge rate of an off-center ganglion cell: is not an absolute measure of light intensity does not depend on the background level of illumination O is highest when receptive field is in complete darkness O is the same for center-only and center-plus-surround illumination Which of the following terms are most suitably matched? Pitch, waveform Loudness, amplitude Frequency, pressure Tonotopy, phaseFrom a biological perspective, how do our senses monitor our body's position and movement? Discuss factors which may influence our vestibular senses. Include a relevant example. Please include references.
- Discuss the importance of performing the Pupillary Light Reflex test. Why is Pupillary Dark Reflex test necessary to perform in the clinic?A psychological test for a two-point threshold of tactile acuity will consistently show that the two-point threshold in the thigh has a 20 mm the two-point threshold in the index finger has a 2 mm the two-point threshold in the nose has a 20 mm the two-point threshold in the upper lip has a 2 mmWhich statement about color perception theory is true? The mechanisms involved in opponent-process theory take place earlier in the perceptual process than those involved in trichromatic theory. The processes proposed by both trichromatic theory and opponent-process theory take place in the primary visual cortex. Trichromatic theory and opponent-process theory are both strongly supported by behavioral and physiological evidence. Recently, trichromatic theory has overtaken opponent-process theory as the best explanation of color and hue perception.
- is a person thought to be could be “brain dead" if the light shining in the eyes causes some ? pupillary miosis. The above suggests that the person is in fact "brain dead" .A scientist has dissected out a small section of the retina and is able to directly record the action potential firing rate in a single ganglion cell. Assume there is a on-center off-surround bipolar cell connected to an on-center off-surround ganglion cell. When applying ‘Stimulus 1’ the scientist records a moderate action potential rate. When applying ‘Stimulus 2’ the rate of action potentials increases substantially. In the context of this experiment no illumination is an option as a 'Stimulus'. ‘Stimulus 2’ would result in what response in the bipolar cell (the one connected to the ganglion cell the scientist is measuring)? A. A large depolarization of the bipolar cell membrane B. The bipolar cell membrane would remain at the resting membrane potential C. A large hyperpolarization of the bipolar cell membrane D. A small hyperpolarization of the bipolar cell membrane E. A small depolarization of the bipolar cell membraneUnilateral Cerebral strokes can cause deficits in motor control, somatic sensation and vision. However, they do not cause deficits in hearing. The explanation for this is: Auditory information does not reach the cortex Auditory information only goes to one hemisphere. Auditory information goes to both hemispheres How are the outer segments of photoreceptors positioned? between bipolar cells and horizontal cells in the outermost layer of the retina in the ganglion cell layer farthest from the pigment epithelium
- Under which condition would the release of neurotransmitter by bipolar cells attached to cones be greatest? Group of answer choices focusing intently on a close object focusing intently on a distant object under normal room light immediately after going outside in bright sunlight in a pitch-black room after 30 minutesThe right optic nerve contains the same set of axons as the right optic tract. Select one: O True O FalseWatch this video (http://openstaxcollege.org/l/occipital) to learn more about a transverse section throughthe brain that depicts the visual pathway from the eye tothe occipital cortex. The first half of the pathway is theprojection from the RGCs through the optic nerve to thelateral geniculate nucleus in the thalamus on either side.This first fiber in the pathway synapses on a thalamic cellthat then projects to the visual cortex in the occipital lobewhere “seeing,” or visual perception, takes place. This video gives an abbreviated overview of the visual systemby concentrating on the pathway from the eyes to theoccipital lobe. The video makes the statement (at 0:45) that“specialized cells in the retina called ganglion cells convertthe light rays into electrical signals.” What aspect of retinalprocessing is simplified by that statement? Explain youranswer.