(Solved): 3. On a molecular level, beta-1 adrenergic receptors in heart tissue increase the amount of Ca++ t ...

3. On a molecular level, beta-1 adrenergic receptors in heart tissue increase the amount of Ca++ that enters the cells. This increased Ca++ will cause cardiac nodal cells (pacemaker cells) to fire faster to increase heart rate; this increased Ca++ will also cause cardiac muscle cells to increase the strength of contraction. What attached to the beta-1 adrenergic receptors to make them do this? Where did these substances come from? 4. What kind of adrenergic receptors are found in the smooth muscle of the walls of blood vessels? What happens to the smooth muscle when these receptors are activated and, systemically, what will this cause in the body? Thus, a beta-blocker that targets these receptors will...