Sunday December 6, 1998 - Question 2

Which of the following statements about the beta-adrenergic receptors is correct?

A. Beta-adrenergic receptors are found only in the myocardium and the lungs.
 
B. Beta-1 adrenergic receptor stimulation has negative cardiac chronotropic and inotropic effects.
 
C. Beta-2 adrenergic receptor stimulation causes smooth muscle relaxation leading to dilation of blood vessels.
 
D. Beta-2 adrenergic receptor stimulation causes an extracellular shift of potassium.
 
E. Blockade of beta-adrenergic receptors has no effect on alpha-receptors.
 
 

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