Photoreceptors

Q.

Body hair and nictitating membrane of an eye are vestigial organs.

1. True

2. False

Q.

Ocelli or fenestrae of cockroach take part in

1. Sight

2. Perception of temperature

3. Perception of light

4. Perception of humidity

Q.

The photoreceptor cells of the retina sensitive to colour are:

1. Cones

2. Rods

3. Organ of Corti

Q.

In what two ways is the yellow spot different from the blind spot?

Q.

Name of the cells of the retina and their respective pigments which get activated (1) in dark and (2) in light.

Q.

Which of the following characteristics is not true for rods in the retina of the eye?

1. They are responsible for vision in dim light

2. They contain the rhodopsin pigment

3. They are confined to the yellow spot

4. There is only one type of rod cell

Q.

The surface of retina has about $125$ million light sensitive

1. rods only

2. cones only

3. rods and cones

4. neither rods nor cones

Q.

Question 46
What are the major parts of the brain? Mention the functions of different parts.

Q.

Statoreceptors are concerned with

1. Equilibrium

2. Pain

3. Light

4. Sound

Q. The decoding and interpretation of visual information is carried out by which part of the brain?

1. Cerebellum
2. Frontal lobe
3. Parietal lobe
4. Temporal lobe
5. Occipital lobe

Q.
What are the two types of photoreceptors and how do their functions differ?

Q. Photoreceptors are present in

1. Cornea
2. Sclera
3. Retina
4. Vitreous humor

Q.

Region in the retina that does not have any photoreceptors.

Enter 2 words only.

__

Q.

Which part of the brain regulates movement and aids in the processing of auditory and visual information?

1. Hindbrain

2. Midbrain

3. Frontal left lobe

4. Frontal right lobe

Q. Which of the following receptors aids hearing?

1. Photoreceptors
2. Olfactory receptors
3. Phonoreceptors
4. Mechanoreceptors

Q.

Photoreceptors are found in

1. Eyes

2. Ears

3. Tongue

4. Skin

Q. A .................... is a specialized type of neuron found in the retina that is capable of phototransduction.

1. Thermoreceptor
2. None of the above
3. Chemoreceptor
4. Photoreceptor

Q. Ants, cockroaches don't have brain then how do they work and from where do they receive orders?

Q. Which of the following are not photoreceptors?

1. Rods and cones of a human eye
2. Ommatidia of cockroach
3. Ruffini's corpuscles
4. All of the above

Q. Rod cells are able to function in low light intensity.

1. True
2. False

Q. At which point of human eye do the optic nerves leave the eye?

1. Blind spot
2. Fovea
3. Yellow spot
4. Both A and C

Q.

Rod cells can differentiate between colours.

1. True

2. False

Q. Vitamin A is associated with the following part of eye?

1. Cones
2. Photo sensitive pigment iodopsin
3. Photosensitive pigment rhodopsin
4. Blind spot

Q.

The light-sensitive cells found on the retina are known as:

1. Rods and cones

2. Iris and pupil

3. Cochlea and pinna

4. Vitreous and aqueous humour

Q. Which photoreceptor is specialized for vision in dim light and allows us to see shapes and movement, and which is specialized for colour and visual acuity?

Q. Mention the receptors for light and sound in animals.

Q. ................... convert light (visible electromagnetic radiation) into signals that can stimulate biological processes.

1. Photoreceptor
2. Chemoreceptor
3. Thermoreceptor
4. None of the above

Q. Which of the following receptors is incorrectly paired with what it senses?

1. Nociceptors - pain
2. Photoreceptors - pain
3. Chemoreceptors - chemicals
4. Thermoreceptors - heat

Q. The rods and cones of the retinal layer are

1. Bipolar neurons
2. Photoreceptor cells
3. Multipolar neurons
4. Hair

Q. Colour is detected by
(a) rods
(b) cones
(c) pigment
(d) choroids