Exam 9: The Autonomic Nervous System

Sympathetic and parasympathetic neurons generally release different neurotransmitters to their smooth muscle effector cells,which is why these neurons often have antagonistic effects.

Pre- and postganglionic sympathetic nerves release norepinephrine.

Which of the following organs HAS dual ANS innervation?

Neural crest cells form

Compared to norepinephrine,epinephrine has one less methyl group.

Damage to the midbrain would probably have a greater effect on the _____________ division of the autonomic nervous system.

Cocaine acts as a sympathomimetic drug because it blocks the reuptake of

Alpha₂-adrenergic receptors on presynaptic axon terminals,when stimulated,cause

Where do autonomic preganglionic neurons originate?

Salivary secretions are decreased and become thicker in response to sympathetic stimulation.

M₂ receptors in the heart

Which autonomic division is dominant in an emergency situation?

Which of the following is NOT a collateral ganglion?

What occurs when one sympathetic preganglionic neuron synapses on several postganglionic neurons?

Postganglionic ____________ nerves release acetylcholine.

The pons is directly involved in regulating the autonomic nervous system.

Damage to an autonomic nerve makes the effector more sensitive to stimulation.

Parasympathetic stimulation increases the rate of passage of material in the small intestine.

A defect in nitric oxide synthetase gene may result in reduced ___________ of cerebral arteries since nitric oxide production would be impaired.

Postganglionic axons which do not secrete either catecholamines or acetylcholine may secrete