Sympathomimetics - Endogenous

Question 1

• agonist at both A and B receptors

- very potent vasoconstrictor and cardiac stimulant

Answer 1

Epinephrine

Question 2

positive inotropic and chronotropic actions in the heart (predominantly B1 receptors), vasoconstriction (A receptors)

Answer 2

Epinephrine

Question 3

activate B2 receptors in skeletal blood vessels leading to vasodilation

Answer 3

Epinephrine

Question 4

result to fall in TPR

Answer 4

Epinephrine

Question 5

increased blood flow during exercise due to activation of B2 receptors

Answer 5

Epinephrine

Question 6

agonist at both A1 and A2 receptors

Answer 6

Norepinephrine

Question 7

activates B1 receptors but with relatively little effect on B2 receptors

Answer 7

Norepinephrine

Question 8

has positive inotropic and chronotropic effects but chronotropic effects are overcome by compensatory baroreceptor activation

Answer 8

Norepinephrine

Question 9

immediate precursor in norepinephrine synthesis

Answer 9

Dopamine

Question 10

effects in regulating sodium excretion and renal function

Answer 10

Dopamine

Question 11

deficiency in the basal ganglia leads to Parkinsons’ Disease

Answer 11

Dopamine

Question 12

treatment for Parkinsons’

Answer 12

Levodopa