This topic contains a solution. Click here to go to the answer

Author Question: A nurse is teaching nursing students about the use of alpha-adrenergic antagonists. Which statement ... (Read 54 times)

faduma

  • Hero Member
  • *****
  • Posts: 528
A nurse is teaching nursing students about the use of alpha-adrenergic antagonists. Which statement by the student indicates the need for further teaching?
 
  a. Alpha-adrenergic antagonists block alpha1 receptors on arterioles and veins.
  b. Dilation of arterioles has a direct effect on arterial pressure.
  c. Dilation of veins by alpha-adrenergic antagonists improves cardiac output.
  d. Venous dilation by alpha-adrenergic antagonists indirectly lowers arterial pressure.

Question 2

Because they cause vasoconstriction, alpha1-adrenergic agonists are especially useful for:
 
  a. extending the duration of local anesthetics.
  b. producing mydriasis to facilitate ophthalmic examinations.
  c. slowing the heart rate in tachycardic patients.
  d. treating hypotension.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

onowka

  • Sr. Member
  • ****
  • Posts: 353
Answer to Question 1

ANS: C
Cardiac output is decreased as a result of the venous dilation caused by alpha-adrenergic antagonists. Alpha-adrenergic antagonists block alpha1 receptors on both arterioles and veins. When alpha1 receptors on arterioles are blocked by alpha-adrenergic antagonists, a direct effect on arterial pressure occurs. When alpha1 receptors on veins are blocked by alpha-adrenergic antagonists, an indirect effect on arterial pressure occurs.

Answer to Question 2

ANS: A
The vasoconstrictive effects of alpha1-adrenergic agonists, such as epinephrine, help delay absorption of a local anesthetic, prolonging the anesthetic's effects. These agents can increase blood pressure but are not the primary drugs used except in emergency situations. Alpha1 receptors in the radial muscles of the iris, not vasoconstriction, cause mydriasis. Reflex bradycardia is a side effect and not a clinical use of these agents.




faduma

  • Member
  • Posts: 528
Reply 2 on: Jul 23, 2018
YES! Correct, THANKS for helping me on my review


sultansheikh

  • Member
  • Posts: 335
Reply 3 on: Yesterday
:D TYSM

 

Did you know?

All patients with hyperparathyroidism will develop osteoporosis. The parathyroid glands maintain blood calcium within the normal range. All patients with this disease will continue to lose calcium from their bones every day, and there is no way to prevent the development of osteoporosis as a result.

Did you know?

Tobacco depletes the body of vitamins A, C, and E, which can result in any of the following: dry hair, dry skin, dry eyes, poor growth, night blindness, abscesses, insomnia, fatigue, reproductive system problems, sinusitis, pneumonia, frequent respiratory problems, skin disorders, weight loss, rickets, osteomalacia, nervousness, muscle spasms, leg cramps, extremity numbness, bone malformations, decayed teeth, difficulty in walking, irritability, restlessness, profuse sweating, increased uric acid (gout), joint damage, damaged red blood cells, destruction of nerves, infertility, miscarriage, and many types of cancer.

Did you know?

People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.

Did you know?

Cucumber slices relieve headaches by tightening blood vessels, reducing blood flow to the area, and relieving pressure.

Did you know?

Stevens-Johnson syndrome and Toxic Epidermal Necrolysis syndrome are life-threatening reactions that can result in death. Complications include permanent blindness, dry-eye syndrome, lung damage, photophobia, asthma, chronic obstructive pulmonary disease, permanent loss of nail beds, scarring of mucous membranes, arthritis, and chronic fatigue syndrome. Many patients' pores scar shut, causing them to retain heat.

For a complete list of videos, visit our video library