Telangana SCERT Class 9 Biology Chapter 6 Solution – Sense Organs. Here in this post we provides Class 9 Biology Sense Organs Telangana State Board Solution. Telangana State Board English Class IX Medium Students can download this Solution to Solve out Improve Your Learning Questions and Answers.
Telanagana State Board Class 9 Biology Chapter 6 Sense Organs Solution:
Q1. Give reasons for:-
1.)We usually do not see bright colours in dim light.
Ans- We usually do not see bright colours in dim light because retina of eye contains rods and cones. Rods help in dim light vision and comes help in bright vision.
2.) Removal of wax layer too often, will raise incidence of ear infection.
Ans- Wax layer present in ear helps to keep the ear canal lubricated, also helps to prevent dust and other particles to enter the ear canal. Removal of wax layer can cause ear infection.
3.) During severe cough and cold we don’t get taste of food.
Ans- During severe cough and cold food seems to be tasteless because when cold is there all the nasal passages are blocked and you don’t get the taste of food.
Q2. Find out the false statement and rewrite the correct ones.
- The rationale behind seeing is just the impression of image in the retina – true.
- Ear functions only to hear – false.
Ear functions to collect and transform the vibrations produced by sound to nerve impulses and maintain balance.
- Iris patterns are like finger prints used in identifying individuals – true.
- Saliva helps taste buds in taste sensation – false
There are taste buds called papillae which helps in taste sensation.
- We are not able to adapt to sensations – false
We are able to adapt to sensation with all sensory organs.
Q3. State the difference between the two:-
1.) Rods and cone :
Rods |
Cones |
Rods contain the pigment called rhodopsin. |
Cones are concentrated in small region called Fovea. |
They detect low intensities of light at night |
Cones give us our sharpest vision. |
Rod give rise to our sensations of colour. |
Cones contain iodospin pigment |
2.) Iris and pupil :
Iris |
Pupil |
The part formed by the choroid layer around pupil is iris. |
Pupil is opening of eye. |
Iris has circular and radial muscles. |
Pupil is the rounded shape, black spot in our eye. |
Iris pattern are used for identification just as our fingerprint. |
Biconvex lens is present behind the pupil. |
3.) Pinna and Tympanum:
Pinna |
Tympanum |
Pinna is a visible part of the ear on either side of our head. |
Tympanum is present at the end of the auditory meatus or ear canal. |
It is crumpled and made up of cartilage. |
Tympanum is also called as ear drum. |
Pinna has ceruminous and sebaceous glands. |
The vibrations from tympanum reach the malleus, incus and stapes. |
4.) Nasal cavity and Ear canal:
Nasal cavity |
Ear canal |
Nasal cavity is present in nose. |
Ear canal is part of ear present inside the ear. |
Nasal cavity is lined with mucous membrane and small hairs. |
The ear canal is also known as auditory meatus. |
Nasal cavity protects from entering dirt and germs inside. |
It is present in between the external and middle ear. |
Q5. Fill in the blanks:-
- Choroid layer provides_protection to the eye.
- The relationship between tongue and_ smell is more.
- Iris pattern is used for individual_ identification.
- Area where optic nerve leaves the eye is called_
- The ear drum is_ tympanum.
Q6. Choose correct option:-
1.) This vitamin is essential for the health of eye.
a) Vitamin A
2.) Sensation is a complex pathway involving
a) Sense organs.
3.) The sound waves of not focused by external pinna and ear canal will result in
b) not hearing anything.
4.) The muscles of eyeball of a person becomes nonfunctional, the invariable effect would be-
b) fails to move eye.
5.) The tongue of a person is exposed to a high salty taste then-
d) fails to taste less salty thing just after exposure.
Draw and label the diagrams, showing the structure of the (AS 5)
1. Eye 2. Ear 3. Tongue
Q8. What happens if your skin loses its sensory nature ?
Ans- Skin is outermost covering of body. It regulates the body temperature and eliminates waste materials through sweat. Skin is sense of touch if the skin loses its sensory then the skin breaks we cannot touch it. The sensory nature is very smooth of skin.
Q10. How would you pay concern to disabled people who are lacking sensory organs?
Ans- If there are disabled people who are lacking sensory organs I would help them by helping to their needs and help in any work which they want. Some sensory organs like eyes can be donated for the disabled people I would try for that and help at my level .
Q11. How do you appreciate the functions of sensory organs which helps us to enjoy the beauty of nature?
Ans- The sensory organs which we have give us an adorable experience at every place. By the eyes we can see the beauty of nature and feel the nature which gives us peace. By nose we can smell the mud that is very precious in nature, when you smell the mud we feel the natures beauty. By touch we can feel the structures of flowers leaves. Some flowers are so pretty to touch and smell even it looks so pretty. This is really amazing experiences of the sensory organs which we have.
Q12. Sagar is not able to listen things properly. Guess what would happen to him. What suggestions would you like to give him?
Ans- Sagar may have some disease of ear or the ear drum would be damaged so he can’t listen things properly. This occurs due to over noise pollution or hearing more sounds that ear can’t take. Suggestions which I would give are do not plug the earphones and listen to more sound. Do not listen high volume while observing any film. Take treatment for that little deafness.
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