respiratory drugs: bronchodilators

Question 1

Bronchoconstriction/bronchodilators usually affect (part of resp tract)

Answer 1

terminal bronchules – smallest of the tree

Question 2

bronchoconstriction can be caused by (SNS/PNS) stimulation

Answer 2

PNS

Question 3

Bronchoconstriction is caused by constriction of smooth muscle around (part of resp tract)

Answer 3

bronchioles

Question 4

2 most common causes of bronchoconstriction

Answer 4

• histamine release (allergies leading to it)

- toxicity

Question 5

histamine receptors cause (contraction/relaxation)

Answer 5

contraction

Question 6

Beta-2 receptors cause (contraction/relaxation)

Answer 6

relaxation

- SNS

Question 7

bronchodilators are available as (3)

Answer 7

• inhalant
• oral
• injectable
  formulations

Question 8

these cause bronchodilation by interfering with smooth muscle cell metabolism (relax)

Answer 8

Methylxanthines

Question 9

these may cause CNS stimulation and GI upset

Answer 9

Methylxanthines

Question 10

these have narrow therapeutic range

Answer 10

Methylxanthines

Question 11

these are metabolized in the liver by enzymes that metabolize many other veterinary drugs

Answer 11

Methylxanthines