Chapter 12: Chemical mediators and the autonomic nervous system

Chapter 12: Chemical mediators and the autonomic nervous system

Complete Chapter Questions With Answers

Sample Questions Are Posted Below

MULTIPLE CHOICE

1. The release of acetylcholine from cholinergic nerve terminals is stimulated by

1. nitric oxide
2. norepinephrine
3. acetylcholine
4. prostaglandins
5. endothelin

Answer a: nitric oxide

2. Co-transmitters released from postganglionic sympathetic neurons include

1. acetylcholine
2. vasoactive intestinal peptide
3. nitric oxide
4. adenosine triphosphate
5. gamma-aminobutyric acid

Answer d: adenosine triphosphate

3. Constriction of bronchi is typically produced by activation of

1. adrenergic beta-1 receptors
2. adrenergic beta-2 receptors
3. muscarinic M₁ receptors
4. muscarinic M₂ receptors
5. muscarinic M₃ receptors

Answer e: muscarinic M₃ receptors

4. Activation of adrenergic beta-2 receptors produces

1. contraction of the iris sphincter muscle
2. relaxation of the iris sphincter muscle
3. relaxation of the ciliary muscle
4. contraction of the ciliary muscle
5. lacrimal gland secretion

Answer c: relaxation of the ciliary muscle