Which of the following is an effect of norepinephrine binding to beta 2 adrenergic receptors?

vasodilation
vasoconstriction
an increase in heart rate
lipolysis

The fauces connects which of th following structures to the oropharynx

List five ways we are indebted to phytoplankton

Which statement is the best summary of the model? a-a series of aerobic and anaerobic reactions take place in cells b- the sun's energy moves through trophic levels in a food chain c-light energy is converted into stored chemical energy plants. d- food molecules are broken down in the cells if living things.