Q. No.Which one of the following is the correct difference between rod cells and cone cells of our retina?
Features
Rod cells
Cone cells
(a)
Visual acuity
High
Low
(b)
Visual pigment contained
Iodopsin
Rhodopsin
(c)
Overall function
Vision in poor light
Colour vision and detailed vision in bright light
(d)
Distribution
More concentrated in centre of retina
Evenly distributed all over retina
1. a
2. b
3. c
4. d
2. b
3. c
4. d
During the transmission of nerve impulses through a nerve fibre, the potential on the inner side of the plasma membrane has which type of electric charge?
| 1. | First negative, then positive, and again back to negative |
| 2. | First positive, then negative, and continue to be negative |
| 3. | First negative, then positive, and continue to be positive |
| 4. | First positive, then negative, and again back to positive |
In the central nervous system, myelinated fibres form the............., while the non-myelinated fibre cells form the.................... .
1. Grey matter, white matter
2. White matter, grey matter
3. Ependymal cells, neurosecretory cells
4. Neurosecretory cells, ependymal cells
Which cranial nerve has the highest number of branches?
1. Facial nerve
2. Trigeminal
3. Vagus nerve
4. None of these
The junction between the axon of one neuron and the dendrite of the next is called:
1. junction point
2. a synapse
3. a joint
4. constant bridge
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 |
Assertion: Neural signals through the parasympathetic nerves can increase the cardiac output.
Reason: Parasympathetic neurons stimulation can increase the activities of SA node and strength
of ventricular contraction.
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
Assertion: Ear is a stato Acoustic organ.
Reason: Ear is related to hearing & balance.
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
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