Stimulation of the beta receptors on heart muscle cells results in
A) the formation of cAMP.
B) increased heart rate.
C) increased force of contraction.
D) all of the above
E) none of the above
Answer: D
Stimulation of the beta receptors on heart muscle cells results in
A) the formation of cAMP.
B) increased heart rate.
C) increased force of contraction.
D) all of the above
E) none of the above
Answer: D