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How apomorphine causes bronchoconstriction?
Apomorphine activates the parasympathetic nervous system.
Inhibition of parasympathetic nervous system activity causes the salivary glands to become?
hypoactive
What branch of the autonomic nervous system causes dilation of the blood vessels supplying skeletal muscles and the heart?
The sympathetic system causes the vessels to constrict (shut blood to core systems) and is often called the fight or flight response. The parasympathetic system causes the vessels to relax and is often called the feed and breed response.
What part of the autonomic nervous system causes an increase in digestive tract mobility?
Stimulation of the Parasympathetic nervous system causes an increase in digestive tract mobility. When stimulated the parasympathetic post-ganglionic neurons release a hormone called Acetylcholine. This causes the Digestive tract to increase its contractions. Counteracting this increase in digestive tract mobility is the sympathetic nervous system, which releases a hormone called noradrenaline which slows down the digestive tracts contractions. This is how the Parasympathetic Nervous System gets the name "rest and digest"
What process does the parasympathetic nervous system not stimulate?
The parasympathetic nervous system does not stimulate the fight or flight response.
Sympathetic and parasympathetic nervous system's are subdivisions of what nervous system?
The sympathetic and parasympathetic nervous systems are subdivisions of the autonomic nervous system.
The autonomic system is composed of the sympathetic and what system?
Parasympathetic system. (sympathetic is commonly referred to as the "fight or flight" system and the parasympathetic is referred to as the "rest and digest" system)
Is bronchoconstriction sympathetic or parasympathetic?
Bronchoconstriction is due to an activation of parasympathetic nervous system.
Prolonged stress may promote illness by depressing the functioning of the?
the parasympathetic nervous system.
Which has more specific local control the sympathetic or parasympathetic division of the autonomic nervous system?
The parasympathetic system has more control, as the sympathetic system includes hormonal effectors that work across the entire body.
How does the synaptic nervous system affect the iris?
The iris is not innervated directly, however the iris sphincter muscle is affected by the sympathetic and parasympathetic nervous systems. Sympathetic stimulation causes pupil dilation while parasympathetic nervous system causes pupil constriction. The parasympathetic response is quicker because of the proximity of a parasympathetic ganglion (ciliary ganglion) to the eye. The sympathetic response is slower because all sympathetic ganglia are confined to the spinal cord. This is the reason why people adjust faster to a bright shining light than darkness.
What does the parasympathetic nervous system stimulate in the micturition reflex?
The parasympathetic nervous system allows the act of micturition. The sympathetic nervous system inhibits it.
