Give the reason for the following :

(i) Medicines dropped in the eye flow down into the nose

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Solution

There is a duct called the nasolacrimal duct which carries the secretion of tear glands into the nasal cavity so sometimes when medicines are dropped in the eye, they flow down into the nose and even throat through the nasal duct.

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Mention if the following statements are true (T) or false (F). Give reason.
(a) Sometimes medicines dropped into the eyes come into the nose and even throat. (T/F)
(b) Ciliary muscles regulate the size of the pupil. (T/F)

(c) The yellow spot of the retina is the region of colour vision. (T/F)
(d) The auditory nerve is purely for perceiving sound. (T/F)
(e) Malleus, incus and stapes are collectively called the ear ossicles. (T/F)
(f) Flavour and taste are one and the same thing. (T/F)
(g) Short-sightedness and hyperopia are one and the same thing. (T/F)
(h) The blind spot is called so because no image is formed on it. (T/F)

Q. Give a reason why the medicine dropped in the eye flows down into the nose.

Q. Sometimes medicine dropped into the eyes come into the nose and throat.Why?

Q. 5. Give reasons for the following:
(a) When a ball is dropped from a height, its speed continuously increases.
(b) When we stop pedaling a bicycle, its speed slows down.

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