TLS Online TPP Program

#Question id: 30068


Norepinephrine secreted by the sympathetic endings binds to β1 receptors, and the resulting:

#Unit 7. System Physiology – Animal
  1. Closing of L channels
  2. Decreasing Ca+2 permeability
  3. Rapidity of the depolarization phase of the impulse
  4. Heart rate decreased