A 25 yr old woman at 32 weeks gestation begins taking a drug

A 25 yr old woman at 32 weeks gestation begins taking a drug to delay the onset of preterm labor. after the first dose, she notices tremulousness in her hands. which of the foll types of receptors is most likely to be involved in this effect?

alpha 1 adrenergic
beta 2 adrenergic
dopaminergic (D1)
muscarinic
NMDA

beta 2 adregernic...most likely salbutamol