Q. No.All the following cranial nerves contain preganglionic parasympathetic fibers except:
1. oculomotor (III)
2. vagus (X)
3. optic (II)
4. glossopharyngeal (IX)
Both sympathetic and parasympathetic divisions of ANS innervate SA node. Their actions on SA node can be called as:
1. antagonistic
2. complementary
3. synergistic
4. additive
Identify the tissue that receives only sympathetic innervations:
1. lung
2. most blood vessels
3. heart
4. small intestine
The "fight or flight" response is associated with:
1. parasympathetic division
2. sympathetic division
3. somatic motor nervous system
4. central nervous system
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In the internal ear, perilymph is found in the:
1. utriculus
2. semicircular canals
3. scala media
4. scala vestibuli
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Linear accelerations and head-tilts in the horizontal plane are detected by:
1. utricle
2. semicircular canals
3. organ of Corti
4. saccule
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An age-related condition when the eye's lens doesn't change shape as easily as it once did [Presbyopia] is usually caused by:
1. decreasing the flexibility of the lens
2. an eyeball that is slightly too short
3. an eyeball that is slightly too long
4. a cornea with asymmetric curvature
Protein synthesis in neuron is carried out directly by:
| 1. | cell body | 2. | neurofibrils |
| 3. | Nissl body | 4. | myelin sheath |
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The most common neurotransmitter in the body is:
1. serotonin
2. GABA
3. acetylcholine
4. adrenaline
An opioid peptide produced in the brain, especially in the pituitary gland, that blocks the sensation of pain is:
1. substance P
2. beta-endorphin
3. nicotine
4. neuropeptide
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