Which of the following isare characteristic of the parasympa

Which of the following is/are characteristic of the parasympathetic nervous system? Fill blank with a YES response for each of the following that is/are characteristic of the parasympathetic nervous system but not of the sympathetic nervous system? Otherwise, put a NO in the blank. Ganglia in or near target tissues _____ nicotinic receptors on postganglionic neurons _____ muscarinic receptors on some target tissues _____ Beta-1 receptors on some target tissues _____ Cholinergic preganglionic neurons _____ Propranolol causes a decrease in heart rate because it _____ (stimulates/deactives) the _____ receptors in the sinoatrial node of the heart.

Solution

a) Ganglia in or near target tissue is No

b) nicotinic receptors on postganglionic neurons is Yes

c)muscarinic receptors on some target tissue is No

d) Beta-1 receptors on some target tissue is No

e)Cholinergic pregangionic neurons is yes

Propranolol causes a decrease in heart rate becasue it deactivates the beta receptors inthe sinoatrial node of the heart