Biology
Where are the following located?
(a) Yellow spot
(b) Lacrimal gland
(c) Organ of Corti
(d) Eustachian canal
(e) Incus
Answer
(a) Yellow spot lies at the back of the eye almost at the centre on the horizontal axis of the eyeball.
(b) Lacrimal glands are located at the upper sideward portion of the eye orbit.
(c) Organ of Corti is present in the middle cochlear canal of the ear.
(d) Eustachian canal connects middle ear to throat.
(e) Incus is located in middle ear.
Related Questions
Given below is the structure of a human eye. Read the information below the diagram and fill in the blanks:
Eyes are the sense organs located in deep sockets on the front side of the head. Eyes can receive the light stimulus and hence considered as photoreceptors. Eyes are protected with eyelids, eyebrows and tear glands, etc. Eyes are visionary in function.
The wall of the eyeball is composed of three concentric layers. The middle layer of the eyeball is (a) ……………, richly supplied with blood vessels whereas the innermost layer is (b) …………… which contains two types of sensory cells. (c) …………… is the extension of the middle layer of the eyeball which regulates the size of the (d) …………… . The image formed on the yellow spot of the eye is the (e) ……………
State whether the following statements are true (T) or false (F). If false, correct them by changing any one single word in each.
(a) Deafness is caused due to rupturing of the pinna.
(b) Semicircular canals are concerned with static (positional) balance.
Given below are two sets (a) and (b) of five parts in each. Rewrite them in correct sequence.
(a) Cochlea, tympanum, auditory canal, ear ossicles, oval window
(b) Conjunctiva, retina, cornea, optic nerve, lens.
Write the main functional activity of each of the following structures.
(a) Cochlea
(b) Semicircular canal
(c) Iris
(d) Choroid
(e) Ciliary body and suspensory ligament