Sense Organs assertion reason questions for Class 10 ICSE
1.) Assertion (A): The lens in the human eye changes its shape to focus on objects at different distances.
Reason (R): The process of changing the shape of the lens is known as accommodation.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False.
Answer:- (b) Both A and R are True
2.) Assertion (A): Taste buds are responsible for detecting different flavors such as sweet, salty, sour, and bitter.
Reason (R): Taste buds are found primarily on the surface of the tongue.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answer:- (c) A is True and R is False
3.) Assertion (A): The olfactory receptors are responsible for the sense of smell.
Reason (R): Olfactory receptors are located in the taste buds on the tongue.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answer:- (b) Both A and R are True
4.) Assertion (A): The cornea is the transparent front part of the eye that covers the iris and the pupil.
Reason (R): The cornea plays a significant role in refracting light entering the eye.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answer:- (b) Both A and R are True
5.) Assertion (A): The eustachian tube connects the middle ear to the throat.
Reason (R): The eustachian tube helps equalize air pressure on both sides of the eardrum.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answer:- (b) Both A and R are True
6.) Assertion (A): Rod cells in the retina are responsible for color vision.
Reason (R): Cone cells in the retina are responsible for detecting light intensity.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answer:- (c) A is True and R is False
7.) Assertion (A): The vestibular system is responsible for detecting changes in head position and movement.
Reason (R): The semicircular canals are part of the vestibular system.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answer:- (b) Both A and R are True
8.) Assertion (A): The tympanic membrane is also known as the eardrum.
Reason (R): The tympanic membrane vibrates in response to sound waves, transmitting them to the middle ear.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answer:- (b) Both A and R are True
9.) Assertion (A): The fovea centralis is a small, central pit in the retina responsible for sharp vision.
Reason (R): The fovea centralis contains a high concentration of rod cells.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answer:- (c) A is True and R is False
10). Assertion (A): The sclera is the white outer layer of the eyeball.
Reason (R): The sclera provides structural support and protection to the eye.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answer:- (b) Both A and R are True
11.) Assertion (A): The iris is responsible for controlling the size of the pupil.
Reason (R): The pupil regulates the amount of light entering the eye.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answers:- (b) Both A and R are True
12.) Assertion (A): The optic nerve transmits visual information from the eye to the brain.
Reason (R): The optic nerve is composed of sensory fibers.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answers:- (b) Both A and R are True
13.) Assertion (A): The cochlea is responsible for hearing and contains hair cells that convert sound vibrations into electrical signals.
Reason (R): The cochlea is part of the inner ear.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answers:- (b) Both A and R are True
14.) Assertion (A): The process of gustation involves the sense of touch to perceive different tastes.
Reason (R): Taste receptors in the mouth are sensitive to temperature and texture.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answers:- (c) A is True and R is False
15.) Assertion (A): The lacrimal glands produce tears that help keep the eyes moist and remove debris.
Reason (R): Tears contain enzymes that break down food particles.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answers:- (a) A is False and R is True
16.) Assertion (A): The sense of proprioception involves the awareness of the position and movement of body parts.
Reason (R): Proprioceptors are sensory receptors located in muscles and joints.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answers:- (b) Both A and R are True
17.) Assertion (A): The tapetum lucidum is a reflective layer in the eyes of certain animals that enhances night vision.
Reason (R): Humans have a tapetum lucidum, contributing to their superior low-light vision.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answers:- (a) A is False and R is True
18.) Assertion (A): The sensation of balance is maintained by the utricle and saccule, which are part of the vestibular system.
Reason (R): The utricle and saccule detect linear acceleration and changes in head position.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answers:- (b) Both A and R are True
19.) Assertion (A): The organ of Corti is responsible for transmitting sound signals to the brain.
Reason (R): The organ of Corti is located in the cochlea.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answers:- (b) Both A and R are True
20.) Assertion (A): The ciliary muscles play a role in adjusting the shape of the lens for near or far vision.
Reason (R): The ciliary muscles are part of the iris.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answers:- (c) A is True and R is False
21.) Assertion (A): The lens in the human eye changes its shape to focus on objects at different distances.
Reason (R): The process of changing the shape of the lens is known as accommodation.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answers:- (b) Both A and R are True
22.) Assertion (A): The sense of taste is primarily detected by taste buds located on the surface of the tongue.
Reason (R): Taste buds are responsible for detecting different flavors such as sweet, salty, sour, and bitter.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answers:- (c) A is True and R is False
23.) Assertion (A): The cornea is the transparent front part of the eye that covers the iris and the pupil.
Reason (R): The cornea plays a significant role in refracting light entering the eye.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answers:- (b) Both A and R are True
24.) Assertion (A): The olfactory receptors are responsible for the sense of smell.
Reason (R): Olfactory receptors are located in the taste buds on the tongue.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answers:- (a) A is False and R is True
25.) Assertion (A): The cochlea is responsible for hearing and contains hair cells that convert sound vibrations into electrical signals.
Reason (R): The cochlea is part of the inner ear.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answers:- (b) Both A and R are True
26.) Assertion (A): The optic nerve transmits visual information from the eye to the brain.
Reason (R): The optic nerve is composed of sensory fibers.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answers:- (c) A is True and R is False
27.) Assertion (A): The eustachian tube connects the middle ear to the throat.
Reason (R): The eustachian tube helps equalize air pressure on both sides of the eardrum.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answers:- (b) Both A and R are True
28.) Assertion (A): Rod cells in the retina are responsible for color vision.
Reason (R): Cone cells in the retina are responsible for detecting light intensity.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answers:- (a) A is False and R is True
29.) Assertion (A): The vestibular system is responsible for detecting changes in head position and movement.
Reason (R): The semicircular canals are part of the vestibular system.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answers:- (b) Both A and R are True
30.) Assertion (A): The tapetum lucidum is a reflective layer in the eyes of certain animals that enhances night vision.
Reason (R): Humans have a tapetum lucidum, contributing to their superior low-light vision.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answers:- (c) A is True and R is False
31.) Assertion (A): The vestibular system is responsible for detecting changes in head position and movement.
Reason (R): The semicircular canals are part of the vestibular system.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answers:- (b) Both A and R are True
32.) Assertion (A): The fovea centralis is a small, central pit in the retina responsible for sharp vision.
Reason (R): The fovea centralis contains a high concentration of rod cells.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answers:- (c) A is True and R is False
33.) Assertion (A): The process of gustation involves the sense of touch to perceive different tastes.
Reason (R): Taste receptors in the mouth are sensitive to temperature and texture.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answers:- (a) A is False and R is True
34.) Assertion (A): The tympanic membrane is also known as the eardrum.
Reason (R): The tympanic membrane vibrates in response to sound waves, transmitting them to the middle ear.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answers:- (b) Both A and R are True
35.) Assertion (A): The sense of taste is primarily detected by taste buds located on the surface of the tongue.
Reason (R): Taste buds are responsible for detecting different flavors such as sweet, salty, sour, and bitter.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answers:- (a) A is False and R is True