Author Question: The nurse would classify which sympathomimetics as binding to and activating adrenergic receptors? ... (Read 92 times)

audragclark · **on:** Jul 23, 2018

The nurse would classify which sympathomimetics as binding to and activating adrenergic receptors? Note: Credit will be given only if all correct choices and no incorrect choices are selected. Standard Text: Select all that apply.

1. Epinephrine
2. Dopamine
3. Amphetamine
4. Cocaine
5. Ephedrine

Question 2

The patient with hypertension has experienced heart failure. The nurse notes that the patient is receiving nifedipine (Procardia). What is a priority assessment for the nurse?

1. Review recent lab results for hypokalemia.
2. Assess urinary output.
3. Assess level of orientation.
4. Auscultate breath sounds for crackles.

ntsoane kedibone · **Reply #1 on:** Jul 23, 2018

Answer to Question 1

1,2,5
Rationale 1: Epinephrine is an endogenous catecholamine that acts directly by binding to and activating adrenergic receptors.
Rationale 2: Dopamine is an endogenous catecholamine that acts directly by binding to and activating adrenergic receptors.
Rationale 3: Amphetamine acts indirectly by affecting norepinephrine release.
Rationale 4: Cocaine acts indirectly by affecting norepinephrine release.
Rationale 5: Ephedrine acts both directly and indirectly.

Global Rationale: Epinephrine and dopamine are endogenous catecholamines that act directly by binding to and activating adrenergic receptors. Amphetamine and cocaine act indirectly by affecting norepinephrine release. Ephedrine acts both directly and indirectly.

Answer to Question 2

4
Rationale 1: Calcium channel blockers do not cause hypokalemia.
Rationale 2: Urinary output may be decreased with heart failure, but it is not a priority assessment at this time.
Rationale 3: Level of orientation may be decreased with heart failure, but it is not a priority assessment at this time.
Rationale 4: Some calcium channel blockers can reduce myocardial contractility and can worsen heart failure. Crackles in the lungs can indicate pulmonary edema, which could indicate heart failure.
Global Rationale: Some calcium channel blockers can reduce myocardial contractility and can worsen heart failure. Crackles in the lungs can indicate pulmonary edema, which could indicate heart failure. Calcium channel blockers do not cause hypokalemia. Level of orientation may be decreased with heart failure, but it is not a priority assessment at this time. Urinary output may be decreased with heart failure, but it is not a priority assessment at this time.