Advertisements
Advertisements
प्रश्न
Give scientific reasons: We cannot distinguish colours in moonlight.
Advertisements
उत्तर
Cone cells in the retina are responsibe for colour vision. They are functional only in bright light. Moon light is unable to stimulate the cone cells; however, the rod cells respond to dim light. Hence, we can see in moon light but cannot distinguish colours.
APPEARS IN
संबंधित प्रश्न
find odd one from following: Malleus, iris, Stapes, Incus.
(i) Draw a well labelled diagram of the membranous labyrinth found in the inner ear.
(ii) Based on the diagram drawn above in (i) give a suitable term for each of the following descriptions :
1. The sensory cells that helps in hearing.
2. The part that is responsible for static balance of the body.
3. The membrane covered opening that connects the middle ear to the inner ear.
4. The fluid present in the middle chamber of cochlea.
5. The structure that maintains dynamic equilibrium of the body.
Given below is a set of five parts. Rewrite them in correct sequence.
Cochlea, tympanum, auditory canal, ear ossicles, oval window.
What is the name of passage in outer ear which carries sound waves to the ear-drum ?
The diagram alongside represents the structure found in the inner ear. Study the same and then answer the questions that follow:
(i) Name the parts labelled A, B, C and D.
(ii) Name the parts of the ear responsible for transmitting impulses to the brain.
(iii) Name the part labelled above which is responsible for:
1. Static equilibrium. 2. Dynamic equilibrium. 3. Hearing
(iv) Name the audio receptor cells which pick up vibrations.
(v) Name the fluid present in the inner ear.
Choose the correct answer :
Organ of corti is found in ___________
Assertion: Human beings Cannot hear infrasonic sounds.
Reason: Sound with a frequency less than 20 Hz is called infrasonic sound.
The eardrum is known as ______.
Given below is the diagram of a part of the human ear. Study the same and answer the questions that follow:
 |
- Give the collective biological term for Malleus, locus and Stapes.
- Name the parts labelled A, B and C in the diagram.
- State the functions of the parts labelled 'A' and 'B'.
- Name the audio receptor region present in the part labelled 'A'.
The figure given below shows the principal parts of a human ear. Study the diagram and answer the following questions.
 |
- Label the parts 1 to 8.
- State the role of parts 6, 7 and 8.
- Why is it harmful to use a sharp object to remove ear wax? Mention the number and name of the part involved.
