List I | List II | ||
A. | Fovea | I | Visible coloured portion of eye that regulates diameter of pupil. |
B. | Iris | II. | External layer of eye formed of dense connective tissue. |
C. | Blind spot | III. | Point of greatest visual acuity or resolution. |
D. | Sclera | IV. | Point where optic nerve leaves the eyeball and photoreceptor cells are absent. |
Options: | A | B | C | D |
1. | II | I | III | IV |
2. | III | I | IV | II |
3. | IV | III | II | I |
4. | I | IV | III | II |
I: | The nose contains mucus-coated receptors which are specialised for receiving the sense of smell are called olfactory receptors. |
II: | Wall of the eyeball has three layers. The external layer is called choroid (dense connective tissue), middle layer is sclera (thin pigmented layer) and internal layer is retina (ganglion cells, bipolar cells and photoreceptor cells) |
1. | Impulse Transmission across a chemical synapse is always faster than that across an electrical synapse. |
2. | The membranes of presynaptic and postsynaptic neurons are in close proximity in an electrical synapse. |
3. | Electrical current can flow directly from one neuron into the other across the electrical synapse. |
4. | Chemical synapses use neurotransmitters. |
Ear wax secreting cells have which type of epithelium?
1. Columnar epithelium
2. Exocrine glandular epithelium
3. Compound epithelium
4. Endocrine glandular epithelium
Match List - I with List - II regarding sensory organs in human.
List - I | List - II |
(a) Organ of corti | (i) Photo receptors |
(b) Nasal mucosa | (ii) Gustatory receptors |
(c) Taste buds | (iii) Auditory receptors |
(d) Retina | (iv) Olfactory receptors |
Choose the correct answer from the option given below
(a) | (b) | (c) | (d) | |
1. | (ii) | (iv) | (iii) | (i) |
2. | (iii) | (iv) | (ii) | (i) |
3. | (iv) | (iii) | (i) | (ii) |
4. | (iii) | (i) | (ii) | (iv) |
List-I | List-II | ||
(a) | Multipolar neuron | (i) | Somatic neural system |
(b) | Bipolar neuron | (ii) | Cerebral cortex |
(c) | Myelinated nerve fibre | (iii) | Retina of Eye |
(d) | Unmyelinated nerve fibre | (iv) | Spinal nerves |
(a) | (b) | (c) | (d) | |
1. | (iii) | (i) | (iv) | (ii) |
2. | (ii) | (iv) | (iii) | (i) |
3. | (ii) | (iii) | (i) | (iv) |
4. | (ii) | (iii) | (iv) | (i) |
Match the following columns and select the correct option
Column-I | Column-II | ||
a. | The organ of Corti | (i) | Connects the middle ear and pharynx |
b. | Cochlea | (ii) | Coiled part of the labyrinth |
c. | Eustachian tube | (iii) | Attached to the oval window |
d. | Stapes | (iv) | Located on the basilar membrane |
(a) | (b) | (c) | (d) | |
1. | (iii) | (i) | (iv) | (ii) |
2. | (iv) | (ii) | (i) | (iii) |
3. | (i) | (ii) | (iv) | (iii) |
4. | (ii) | (i) | (i) | (iv) |
Which of the following statements is correct?
1. | Cornea consists of dense matrix of collagen and is the most sensitive portion of the eye. |
2. | Cornea is an external, transparent and protective proteinaceous ring of the eyeball |
3. | Cornea consists of dense connective tissue of elastin and can repair itself |
4. | The Cornea is convex, transparent layer which is highly vascularised |