Activation of which kind of receptor causes heart rate to ...

[mpobi80]

Activation of which kind of receptor causes heart rate to increase?
 A) alpha-one
  B) beta-one
  C) muscarinic
  D) beta-two
  E) preganglionic

Question 2

Contraction of the cremaster muscles
 A) tenses the scrotum.
  B) pulls the testes closer to the body cavity.
  C) propels sperm through the urethra.
  D) moves sperm through the ductus deferens.
  E) tenses the scrotum and pulls the testes closer to the body cavity.

[Missbam101]

Answer to Question 1

B

Answer to Question 2

E

[mpobi80]

Thanks for the timely response, appreciate it

[bdobbins]

Excellent