39) Which of the following is mi A) sympathetic preganglion ) parasympathetic pr
ID: 3524320 • Letter: 3
Question
39) Which of the following is mi A) sympathetic preganglion ) parasympathetic preganglionic fibers, re is mismatehed releast AcC fibers; release ACh C) somatic fibers; release ACh D) sympathetic postganglionic fibers: re E) parasympathetic postganglionic f velease release NE fibers, release NE 40) Which of the following tatemiemtsvs nto thusing A) The comea helps converge light ore swhen the optic B) The lens of the eye will bulge eused te ens C) The light entering the eye e sht D) The iris retina through the lens rays onto tocusing on far objects Di The light entering the eye is thape of the lepil. nuscles control the shape of the lens cary muscles control the size of the pupil. 41) Which structures are yis B) Pretectal nuclei E) Primary visual cortex A) Lateral geniculate n D) 42) The parB) A ciliary B)pterygopalatine 43) Vibrations of the cochlsar duct cause the stereocilia of the hair s that constrict the iris originate E) C otic D) submandibular E r duct cause the stereoc C) Tectorial which membrane? A) Tympanic B) Vestibular correct signal transmission For 44-45 uSs the figure shown below to match the co Light 44) cGMP-gated channels close resulting in photoreceptor hyperpolarization 45) Lack of IPSP in bipolar neuron causes depolarizationExplanation / Answer
39 E) parasympathetic postganglionic fibers; release NE :- parasympathetic post ganglion release ACh and not NE.
40 A) The cornea helps converge light rays on the retina through the lens :- Human eye surrounded and protected by cornea which helps convergence of light rays in to retina.
41 C) Superior colliculi :- visual reflex centers controlling the extrinsic muscles of the eyes :- superior colliculi are bilobed structure present in the midbrain and have visual reflex centers which controls the extrinsic muscles of eye.
42 A) ciliary:- ciliary ganglia is the center for impulse that modify intra ocular pressure and have parasympathetic fibers that constrict iris.
43 C) Tectorial :- cochlea of ear comprise two membranes , basilar and tectorial membrane. Vibrations of cochlear duct causes stereocillia of the hair cells to bend against tectorial membrane.
44 A) cGMP-gated channels close causing cation influx to stop. Photoreceptors hyperpolarize :- first step of the light transmission pathway and cause voltage gated Ca2+ channels to get close.
45 B) Lack of IPSPs in bipolar cell results in depolarization : This event of light transmission pathway occurs when action potentials propagates along optic nerve.
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