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In humans, visceral organs are innervated by

1. sympathetic nerves and are under conscious control
2. parasympathetic nerves and are under conscious control
3. both sympathetic and parasympathetic nerves and are under conscious control
4. both sympathetic and parasympathetic nerves but are not under conscious control

Correct answer: both sympathetic and parasympathetic nerves and are under conscious control

Solution

Visceral organs are innervated by both sympathetic and parasympathetic nerves, but their activity is not under conscious control.

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