A nurse is teaching a nursing student about the two classes of adrenergic agonist drugs. Which statement by the nursing student indicates understanding of the teaching?

a. "Catecholamines may be given orally."
b. "Catecholamines often require continuous infusion to be effective."
c. "Noncatecholamines do not cross the blood-brain barrier."
d. "Noncatecholamines undergo rapid de-gradation by monoamine oxidase."


B
Catecholamines undergo rapid degradation by monoamine oxidase (MAO) and cate-chol-O-methyltransferase (COMT). Consequently, they have a brief duration of action, and con-tinuous infusion often is required to maintain the drug's effects. Catecholamines cannot be used orally. Catecholamines do not cross the blood-brain barrier; noncatecholamines do. Noncatecho-lamines are not degraded by MAO.

Nursing

You might also like to view...

Which statement correctly describes the nurse's responsibility related to electronic monitoring?

a. Teach the woman and her support person about the monitoring equipment and discuss any questions they have. b. Report abnormal findings to the physician before initiating corrective actions. c. Inform the support person that the nurse will be responsible for all comfort measures when the electronic equipment is in place. d. Document the frequency, duration, and intensity of contractions measured by the external device.

Nursing

America was on its way to creating a holistic health-care system until which of the following events marked the beginning of a change of focus for health care?

a. Discovery of sulfa in the 1930s b. Introduction of health-care insurance in the 1940s c. Immigration of Europeans in the 1920s d. Rural to urban migration of people in the 1950s

Nursing

A client lives alone. He is very weak, stays in bed most of the time, and becomes fatigued after taking only two or three steps with a walker

His personal hygiene is poor. He moves very slowly when doing even small tasks such as eating a meal. Which of the following are appropriate interventions for this patient? Select all that apply. a. Arrange for a home aide to assist with activities of daily living. b. Refer the client to a senior center for an adapted physical activity program. c. Assess the patient for symptoms of depression and memory loss. d. Arrange for nutritious meals to be delivered to the patient's home.

Nursing

Which teaching guideline would help prevent eye injuries during sports and play activities?

a. Restrict helmet use to those who wear eye glasses or contact lenses. b. Discourage the use of goggles with helmets. c. Wear eye protection when participating in high-risk sports such as paintball. d. Wear a face mask when playing any sport or playing roughly.

Nursing