Q. No.What are the simplest sensory receptors in a nervous system?
1. electromagnetic receptors
2. auditory receptors
3. chemoreceptors
4. free nerve endings that depolarize in response to direct physical stimulation
1. electromagnetic receptors
2. auditory receptors
3. chemoreceptors
4. free nerve endings that depolarize in response to direct physical stimulation
How does stimulus intensity and action potential frequency relate?
1. The greater the stimulus, the stronger the resulting action potentials sent to the brain.
2. The greater the stimulus, the greater the frequency of action potentials sent to the brain.
3. The greater the stimulus, the lower the frequency of action potentials sent to the brain.
4. The stimulus is ten times greater than the frequency of the resulting action potentials sent to the brain.
The autonomic division of the peripheral nervous system does not innervate:
1. visceral organs
2. exocrine glands
3. skeletal muscle
4. endocrine glands
Identify the correct statement regarding parasympathetic neurons:
1. They for the thoraco-lumbar outflow.
2. They emerge from the brain and sacral regions.
3. The preganglionic neurons are shorter.
4. They may have ganglia located along the spinal cord.
Which of the following statements about parasympathetic neurons is true?
1. The nerve fibers are contained in spinal nerves.
2. They synapse in terminal ganglia, either next to or within the organs innervated.
3. They originate in thoracic and lumbar regions of the spinal cord.
4. Postganglionic fibers are usually longer than those of sympathetic neurons.
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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