Receptors

Question 1

What are the major sympathetic and parasympathetic receptors found on the heart and what are their major functions?

Answer 1

S = beta 1, increase HR, conduction, contractility
P = M2, decrease HR, conduction, contractility (main function is on the SA node)

Question 2

What are the major sympathetic and parasympathetic receptors found on the blood vessels and what are their major functions?

Answer 2

S = alpha 1, vasoconstriction
S = beta 2, vasodilation
P = M3 on salivary glands only , dilation

Question 3

What are the major sympathetic and parasympathetic receptors found on the endothelium and what are their major functions?

Answer 3

S = none
P = M3, activation of NO

Question 4

What are the major sympathetic and parasympathetic receptors found on the tracheal/bronchial SM and what are their major functions?

Answer 4

S = beta 2, relaxation/dilation
P = M2/M3, contraction/constriction

Question 5

What are the major sympathetic and parasympathetic receptors found on the bronchial glands and what are their major functions?

Answer 5

S = alpha 1, decreased secretion
S = beta 2, increased secretion
P = M3, stimulation