Q. No.
The transparent lens in the human eye is held in its place by?
1. ligaments attached to the ciliary body
2. ligaments attached to the iris
3. smooth muscles attached to the iris
4. smooth muscles attached to the ciliary body
2. ligaments attached to the iris
3. smooth muscles attached to the iris
4. smooth muscles attached to the ciliary body
Choose the correct statement:
| 1. | Nociceptors respond to changes in pressure |
| 2. | Meissner's corpuscles are thermoreceptors |
| 3. | Photoreceptors in the human eye are depolarised during darkness and become hyperpolarised in response to the light stimulus |
| 4. | Receptors do not produce graded potentials |
Photosensitive compound in the human eye is made up of:
| 1. Opsin and Retinal | 2. Opsin and Retinol |
| 3. Transducin and Retinene | 4. Guanosine and Retinol |
In the mammalian eye, the ‘fovea’ is the center of the visual field, where?
1. high density of cones occur, but has no rods
2. the optic nerve leaves the eye
3. only rods are present
4. more rods than cones are found
Which of the following regions of the brain is incorrectly paired with its function?
| 1. | Medulla oblongata-Homeostatic control |
| 2. | Cerebellum-Language comprehension |
| 3. | Corpus callosum-Communication between the left and right cerebral cortices |
| 4. | Cerebrum-Calculation and contemplation |
A gymnast is able to balance his body upside down even in total darkness because of:
1. cochlea
2. vestibular apparatus
3. tectorial membrane
4. the organ of Corti
Injury localized to the hypothalamus would most likely disrupt:
1. short-term memory
2. co-ordination during locomotion
3. executive functions, such as decision making
4. regulation of body temperature
Which one of the following statements is not correct?
| 1. | Retinal is the light-absorbing portion of visual photo pigments |
| 2. | In retina, the rods have the photopigments rhodopsin while cones have three different photopigments. |
| 3. | Retinal is a derivative of Vitamin C |
| 4. | Rhodopsin is the purplish protein present in rods only. |
Parts A, B, C and D of the human eye are shown in the diagram. Select the option which gives correct identification along with its functions/characteristics:
| 1. | B-blind spot has only a few rods and cones |
| 2. | C-aqueous chamber reflects the light which does not pass through the lens |
| 3. | D-choroid- its anterior part forms the ciliary body |
| 4. | A-retina - contains photoreceptors rods and cones |
A diagram showing the axon terminal and synapse is given. Identify correctly at least two of A-D:
1. B- Synaptic connection; D- K+
2. A- Neurotransmitter; B- Synaptic cleft
3. C- Neurotransmitter; D- Ca++
4. A- Receptor; C- Synaptic vesicles
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