Neural Control and Coordination
- Which one of the following is the correct difference between Rod Cells and Cone Cells of our retina?
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Rod cells is a type of light sensitive receptor cell present in the retinas of vertebrates. Rod contains the pigment rhodopsin and are essential for vision in dim light. Cone cells is a type of light sensitive receptor cell, found in retinas of all diurnal vertebrates. Cones are specialized to transmit information about colour and are responsible for the visual acuity of the eye. They function best in bright light.
Correct Option: C
Rod cells is a type of light sensitive receptor cell present in the retinas of vertebrates. Rod contains the pigment rhodopsin and are essential for vision in dim light. Cone cells is a type of light sensitive receptor cell, found in retinas of all diurnal vertebrates. Cones are specialized to transmit information about colour and are responsible for the visual acuity of the eye. They function best in bright light.
- Which of the following is an example of negative feedback loop in humans?
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When the set point of hypothalamus is disturbed by high temperature, it stimulates vasodilation and sweating while in low temperature there is vasoconstriction and shivering.
Correct Option: D
When the set point of hypothalamus is disturbed by high temperature, it stimulates vasodilation and sweating while in low temperature there is vasoconstriction and shivering.
- Vagus nerve is
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Vagus nerve is 10th pair of nerves arising from medulla oblongata of brain. These are mixed nerves i.e. having both sensory as well as motor nerve fibres.
Correct Option: A
Vagus nerve is 10th pair of nerves arising from medulla oblongata of brain. These are mixed nerves i.e. having both sensory as well as motor nerve fibres.
- A person entering an empty room suddenly finds a snake right in front on opening the door. Which one of the following is likely to happen in his neuro-hormonal control system?
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Epinephrine and norepinephrine are secreted by adrenalmedulla in response to stress of any kind and during emergency situations and are called emergency hormones or hormones of flight, or fight.
Correct Option: A
Epinephrine and norepinephrine are secreted by adrenalmedulla in response to stress of any kind and during emergency situations and are called emergency hormones or hormones of flight, or fight.
- Stimulation of a muscle fiber by a motor neuron occurs at:
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The neuromuscular junction connects the nervous system to the muscular system via synapses between efferent nerve fibres and muscle fibres.
Correct Option: A
The neuromuscular junction connects the nervous system to the muscular system via synapses between efferent nerve fibres and muscle fibres.