[neurotransmitters are rel...] Unidirectional transmission of a nerve impulse through nerve fibre is due to the fact that:

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Unidirectional transmission of a nerve impulse through nerve fibre is due to the fact that:

nerve fibre is insulated by a medullary sheath

sodium pump starts operating only at the cyton and then continues into the nerve fibre

neurotransmitters are released by dendrites and not by axon endings

neurotransmitters are released by the axon endings and not by dendrites

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The function of vagus nerve innervating the heart is to

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Cornea transplant in humans is almost never rejected. This is because:

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When sympathetic nervous system is activated it causes the secretion of

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Given below is a table comparing the effects of sympathetic and parasympathetic nervous system for four features (a-d). Which one feature is correctly described?

Feature	Sympathetic Nervous System	Parasympathetic Nervous System
(a) Salivary gland	Stimulates secretion	Inhibits secretion
(b) Pupil of the eye	Dilates	Constricts
(c) Heart rate	Decreases	Increases
(d) Intestinal peristalsis	Stimulates	Inhibits

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During the transmission of nerve impulse through a nerve fibre, the potential on the inner side of the plasma membrane has which type of electric charge?

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Which one of the followings is the largest portion of the brain in humans?

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Which one of the following pairs of structures distinguishes a nerve cell from other types of cell?

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Which one of the following is an example of negative feedback loop in humans?

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How many laminae are present in the grey matter of spinal cord?

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Unidirectional transmission of a nerve impulse through nerve fibre is due to the fact that:

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