When light fell on the eye, the pupil: a. does not constrict if the optic nerve is severed b. does not respond if the sympathetic system is not functioning c. does not respond if the cholinergic system is blocked d. does not respond if the pretectal nucleus is damaged

When light fell on the eye, the pupil:
a. does not constrict if the optic nerve is severed
b. does not respond if the sympathetic system is not functioning
c. does not respond if the cholinergic system is blocked
d. does not respond if the pretectal nucleus is damaged
by

1 Answer

Answer :

does not respond if the pretectal nucleus is damaged
by

Related questions

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Last Answer : is a parasympathetic relay ganglion for fibers from the Edinger-Westphal nucleus

The following are true about pupil reaction to light: a. secretion of acetylcholine is responsible for pupil dilatation b. constriction of the pupil is mediated by nerve fibres travelling in the short ciliary nerve c. dilatation of the pupil is mediated by nerve fibres travelling in the long ciliary nerve d. the sympathetic nerve innervates the dilator muscles

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If optic nerve is severed will you lose sight in both eyes?

Description : If optic nerve is severed will you lose sight in both eyes?

Last Answer : no, only in the eye witch the optic nerve is damaged

If optic nerve is severed will you lose sight in both eyes?

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Last Answer : no, only in the eye witch the optic nerve is damaged

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Last Answer : Glaucoma

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A person was unable to close his right eye. There is dribbling of saliva from right angle of his mouth and he in unable to make a pout. The probable diagnosis is Options: 1) Bell’s Palsy 2) Trigeminal Neuralgia 3) Optic Nerve Injury 4) Oculomotor Nerve Injury

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When a person enters a dark room from bright light he is not able to see clearly for little while because ______ A. Eye is unable to adjust itself immediately B. Retina becomes insensitive momentarily C. Iris is unable to dilate the pupil immediately D. Distance between the lens and retina take time to adjust

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Last Answer : ANSWER: C

When a person enters a dark room from bright light, he is not able to see clearly for a little while because the (a) eye is unable to adjust itself immediately (b) retina becomes insensitive momentarily (c) iris is unable to dilate the pupil immediately (d) distance between the lens and retina takes time to adjust

Description : When a person enters a dark room from bright light, he is not able to see clearly for a little while because the (a) eye is unable to adjust itself immediately (b) retina becomes insensitive ... is unable to dilate the pupil immediately (d) distance between the lens and retina takes time to adjust

Last Answer : Ans:(c)

When a person enters a dark room from bright light he is not able to see clearly for a little while because the? A. Eye is unable to adjust itself immediately B. Retina becomes insensitive momentarily C. Iris is unable to dilate the pupil immediately (Answer) D. Distance between the lens and retina take time to adjust

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Last Answer : C. Iris is unable to dilate the pupil immediately (Answer)

In myasthenia gravis: a. the vertical muscles of the eye are more commonly involved than the horizontal muscles b. the pupil reaction to light is sluggish c. absent antibody to acetylcholine receptors exclude the diagnosis d. Cogan's twitch refers to involuntary twitching of the orbicularis

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Function of iris is to (a) move lens forward and backward (b) refract light rays (c) bring about movements of eye lids (d) alter the size of pupil.

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The _______ the amount of light entering the eye. a)iris b)pupil c)cornea d)lens

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Last Answer : ANSWER: X -- THE PUPIL OF THE EYE NARROWS WHICH INCREASES THE DEPTH OF FOCUS

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Last Answer : ANSWER: B -- Midbrain

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