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Select the answer with correct matching of the structure, its location and function.
A
Eustachian tube – Anterior part of internal ear – Equalizes air pressure on either sides of tympanic membrane
B
Cerebellum – Mid brain – Controls respiration and gastric secretions
C
Hypothalamus – Fore brain – Controls body temperature, urge for eating and drinking
D
Blind spot – Near the place where optic nerve leaves the eye – Rods and cones are present but inactive here
Detailed Solution
The hypothalamus lies at the base of the thalamus, which is part of the forebrain; it contains centres that control body temperature and the urge for eating and drinking. This row is fully correct.
The Eustachian tube does equalise the pressure on either side of the ear drum, but it connects the middle ear cavity with the pharynx; it is not part of the internal ear.
The cerebellum is part of the hindbrain and maintains balance and posture; respiration and gastric secretions are controlled by the medulla.
The blind spot is the point where the optic nerve leaves the eye and the retinal blood vessels enter it; photoreceptor cells are not present in that region.
Hence the correct match is hypothalamus – forebrain – controls body temperature, urge for eating and drinking.
The Eustachian tube does equalise the pressure on either side of the ear drum, but it connects the middle ear cavity with the pharynx; it is not part of the internal ear.
The cerebellum is part of the hindbrain and maintains balance and posture; respiration and gastric secretions are controlled by the medulla.
The blind spot is the point where the optic nerve leaves the eye and the retinal blood vessels enter it; photoreceptor cells are not present in that region.
Hence the correct match is hypothalamus – forebrain – controls body temperature, urge for eating and drinking.