Match the following columns and select the correct option:- Column - I column - II (a) Rods and cones (i) Absence of photoreceptor cells (b) Blind spot (ii) Cones are densely packed (c) Fovea (iii) Photoreceptor cells (d) Iris (iv) Visible coloured portion of the eye

( a ) - ( iiii ) , ( b ) - ( i ) , ( c ) - ( ii ) , ( d ) - ( iv )

( a ) - ( ii ) , ( b ) - ( iii ) , ( c ) - ( i ) , ( d ) - ( iv )

( a ) - ( iii ) , ( b ) - ( iv ) , ( c ) - ( ii ) , ( d ) - ( i )

( a ) - ( ii ) , ( b ) - ( iv ) , ( c ) - ( iii ) , ( d ) - ( i )

Observe the given steps related to the experience of taste and arrange them properly. Impulses reach the brain through the nerves. The taste detecting chemoreceptors are stimulated. The substances reach the taste buds through saliva. Substances responsible for taste dissolves in saliva. Forms the experience of taste. Impulses form in the chemical receptors.

Taste can be characterised as a physiological process by which we can know the nature of the food. At first, we intake the food and the foods are broken into pieces by teeth and lubricated by saliva. The tongue facilitates the process of mixing food with saliva. The food particles are sensed by the taste buds. Then the chemoreceptors get stimulated and the impulses for the taste are carried by the glossopharyngeal nerve. This nerve carries the impulse to the brain. After the processing of impulses, the individual can experience the taste of the food. The steps are arranged and given below: Substances responsible for taste dissolve in saliva. The substance reaches the taste buds through saliva. The taste detecting chemoreceptors are stimulated. Impulses form in the chemical receptors. Impulses reach the brain through the nerves. Forms the experience of taste.

Match the following columns and select the correct option. Column-I Column-II (a) Organ of Corti (i) Connects middle ear and pharynx (b) Cochlea (ii) Coiled part of the labyrinth (c) Eustachian tube (iii) Attached to the oval window (d) Stapes (iv) Located on the basilar membrane

(a)-(iv), (b)-(ii), (c)-(i), (d)-(iii)

(a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)

(a)-(i), (b)-(ii), (c)-(iv), (d)-(iii)

(a)-(ii), (b)-(iii), (c)-(i), (d)-(iv)

EASY

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Passage connecting middle ear with pharynx is called : -

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Important Questions on Nervous System

MEDIUM

Biology>Biology of Animal Systems>Nervous System>Sense Organs

Match the following columns and select the correct option:-

Column $- I$		column $- II$
(a)	Rods and cones	(i)	Absence of photoreceptor cells
(b)	Blind spot	(ii)	Cones are densely packed
(c)	Fovea	(iii)	Photoreceptor cells
(d)	Iris	(iv)	Visible coloured portion of the eye

HARD

Biology>Biology of Animal Systems>Nervous System>Sense Organs

Which of the following statement is correct?
(i) The rods contain a purplish-red protein called the rhodopsin.
(ii) The photopigments are embedded in the membrane discs of the inner segment.
(iii) Retinal is a derivative of vitamin A.
(iv) Light induces dissociation of the retinal from opsin resulting in changes in the structure of the opsin.

MEDIUM

Biology>Biology of Animal Systems>Nervous System>Sense Organs

Which one of the following statements is not correct?

MEDIUM

Biology>Biology of Animal Systems>Nervous System>Sense Organs

Observe the given steps related to the experience of taste and arrange them properly.

Impulses reach the brain through the nerves.
The taste detecting chemoreceptors are stimulated.
The substances reach the taste buds through saliva.
Substances responsible for taste dissolves in saliva.
Forms the experience of taste.
Impulses form in the chemical receptors.

EASY

Biology>Biology of Animal Systems>Nervous System>Sense Organs

Write any two diseases/defects of the ear.

EASY

Biology>Biology of Animal Systems>Nervous System>Sense Organs

In a blind spot of the human eye

EASY

Biology>Biology of Animal Systems>Nervous System>Sense Organs

Which of the following statements is correct?

EASY

Biology>Biology of Animal Systems>Nervous System>Sense Organs

When one goes from a brightly lit area to a dimly lit room our eyes adjusts slowly, thereby regaining the clarity of vision. Which ONE of the following explains this process?

EASY

Biology>Biology of Animal Systems>Nervous System>Sense Organs

The photosensitive compound in the human eye is made up of:

EASY

Biology>Biology of Animal Systems>Nervous System>Sense Organs

In the mammalian eye, the 'fovea' is the the center of the visual field, where:

MEDIUM

Biology>Biology of Animal Systems>Nervous System>Sense Organs

Scientists find a gene

P

that helps human peripheral neurons to sense temperature less than

13 ° C

and induce a physiological signal of avoidance. This gene is present in almost all vertebrates. Considering that gene

P

has role only in detection of low temperature, the correct statement(s) is(are)

MEDIUM

Biology>Biology of Animal Systems>Nervous System>Sense Organs

Match the following columns and select the correct option.

	Column-I		Column-II
(a)	Organ of Corti	(i)	Connects middle ear and pharynx
(b)	Cochlea	(ii)	Coiled part of the labyrinth
(c)	Eustachian tube	(iii)	Attached to the oval window
(d)	Stapes	(iv)	Located on the basilar membrane

EASY

Biology>Biology of Animal Systems>Nervous System>Sense Organs

The transparent lens in the human eye is held in its place by

HARD

Biology>Biology of Animal Systems>Nervous System>Sense Organs

Choose the correct statements.

EASY

Biology>Biology of Animal Systems>Nervous System>Sense Organs

In mammals, quadrate is modified as

MEDIUM

Biology>Biology of Animal Systems>Nervous System>Sense Organs

A gymnast is able to balance his body upside down even in the total darkness because of:

EASY

Biology>Biology of Animal Systems>Nervous System>Sense Organs

The total number of ear bones in man is?

MEDIUM

Biology>Biology of Animal Systems>Nervous System>Sense Organs

Schneiderian and tympanic membranes respectively belongs to

EASY

Biology>Biology of Animal Systems>Nervous System>Sense Organs

Which one of the following is enclosing the tympanum in mammals?

HARD

Biology>Biology of Animal Systems>Nervous System>Sense Organs

Arrange the following structures to make the correct pathway for passing sound waves which finally converts into neural impulses in the organ of Corti?
(A) Ear pinna and external auditory meatus
(B) Reissner's and tectorial membrane
(C) Tympanum and ear ossicles
(D) Oval window
(E) Perilymph of scala vestibuli

Passage connecting middle ear with pharynx is called : -

Important Questions on Nervous System

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