Autonomic Nervous System

Which of the following is a feature of the parasympathetic division of the autonomic nervous system?

• postganglionic neurones with cell bodies in anterior horn of S2-S4 segments of spinal cord

• preganglionic neurones will cell bodies in lumbar segments of spinal cord

• postganglionic neurones with relatively short axons

• synapses between preganglionic and postganglionic neurones in collateral ganglia

• preganglionic neurones with large diameter myelinated axons

Which of the following is not a beta-2 adrenergic receptor mediated effect?

• vasoconstriction of blood vessels in skin

• dilation of smooth muscle of airways

• vasodilation of blood vessels in cardiac muscle

• decrease molility of digestive tract

• vasodilation of blood vessels in skeletal muscle

Which of the following associations between activation of muscarinic acetylcholine receptor types and physiological responses is incorrect?

• activation of M3 receptors causes an increase in secretion from salivary glands

• activation of M2 receptors causes a decrease in heart rate

• activation of M1 receptors causes an increase in contraction of sphincters of the digestive tract

• activation of M3 receptors causes an increase in contraction of smooth muscle of digestive tract

• activation of M1 receptors cause an increased secretion from gastric glands of stomach

Which of the following is/are features of the autonomic nervous system?

1. the control of secretions of some glands

2. the control of contraction of skeletal muscle

3. unconscious control of smooth muscle

• 1 only

• 1 & 3 only

• 2 & 3 only

• 2 only

• 1 & 2 only

Which of the following is not a characteristic of the sympathetic division of the autonomic nervous system?

• preganglionic neurones with short axons

• preganglionic neurones with their cell bodies in T1 to L2/3 segments of spinal cord

• sympathetic postganglionic neurones with large diameter myelinated axons

• postganglionic neurones with long axons

• it is also known as thoracolumbar division

Which of the following is NOT a consequence of activity in sympathetic division of autonomic nervous system (ANS)?

• increased force of contraction of heart

• dilation of bronchioles

• constriction of pupils of the eye

• decreased motility of digestive tract

• increased rate of contraction of the heart

Which of the following correlations between drugs and clinical uses is correct?

Drug     Clinical Use

1. Pirenzepine      A. Treatment of hypertension

2. Atropine     B. Reduction of salivary secretion

3. Metoprolol      C. Treatment of gastric ulcers

4. Salbutamol     D. Treatment of asthma

• 1-D, 2-C, 3-A, 4-B

• 1-C, 2-B, 3-D, 4-A

• 1-C, 2-D, 3-B, 4-A

• 1-A, 2-B, 3-C, 4-D

• 1-C, 2-B, 3-A, 4-D

Drugs which block the effects of activity in the sympathetic division of the autonomic nervous system are called?

• adrenergic receptor agonists

• sympathomimetics

• sympathetic antagonists

• parasympathetic antagonists

• parasympathomimetics

Which of the following is/are feactures of the autonomic nervous system?

1. the control of secretions of some glands

2. the control of contraction of skeletal muscle

3. unconscious control of smooth muscle

• 1 only

• 1 & 2 only

• 1 & 3 only

• 2 only

• 2 & 3 only

In many respects the secretory cells of the adrenal medulla are analogous to which of the following classes of neurone?

• parasympathetic postganglionic neurones

• parasympathetic preganglionic neurones

• unsympathetic neurones

• sympathetic postganglionic neurones

• sympathetic preganglionic neurones