The sympathetic nervous system induces:
Correct answer: B. Increased heart rate
- A. Secretion of digestive juices
- B. Increased heart rate
- C. Secretion of saliva
- D. All of these.
Explanation
The sympathetic nervous system is a component of the autonomic nervous system consisting of a pair of sympathetic trunks, preganglionic sympathetic fibres, postganglionic sympathetic fibres and collateral ganglia. It quickens the rate and force of heartbeat while it inhibits the secretion of saliva and gastric juice.
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About Coordination and Control
Coordination depends on receptors, neurons, synapses and nerve impulses, with reflex actions traced through the reflex arc and the roles of major brain regions. Chemical coordination covers endocrine glands and hormones, including how hormones regulate growth, metabolism, reproduction and internal balance, unlike rapid nervous control.
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