This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: A 50-year-old received trauma to the chest that caused severe impairment of the primary pace-maker ... (Read 96 times)

fnuegbu

  • Hero Member
  • *****
  • Posts: 539
on: Jun 25, 2018
A 50-year-old received trauma to the chest that caused severe impairment of the primary pace-maker cells of the heart. Which of the following areas received the greatest damage?
 
  a. Atrioventricular (AV) node
  b. Sinoatrial (SA) node
  c. Bundle of His
  d. Ventricles

Question 2

A 28-year-old with seizure disorder has a vagus nerve stimulator implanted to help control sei-zure activity. Which result will the nurse expect to occur?
 
  a. Increased speed of cardiac cycle
  b. Increased cardiac contractility
  c. Decreased vasodilation
  d. Decreased cardiac conduction


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Dominic

  • Sr. Member
  • ****
  • Posts: 328
Reply #1 on: Jun 25, 2018
Answer to Question 1

ANS: B
The SA node, not the AV node, is considered the pacemaker of the heart. Neither the bundle of His nor the ventricles are involved.

Answer to Question 2

ANS: D
The vagus nerve releases acetylcholine. Acetylcholine causes decreased heart rate and slows conduction through the AV node, thus decreasing the speed of the cardiac cycle. This reaction also decreases contractility but does not cause decreased vasodilation.


fnuegbu

  • Member
  • Posts: 539
Reply 2 on: Jun 25, 2018
Thanks for the timely response, appreciate it

parshano

  • Member
  • Posts: 333
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

People about to have surgery must tell their health care providers about all supplements they take.

Did you know?

The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").

Did you know?

Chronic necrotizing aspergillosis has a slowly progressive process that, unlike invasive aspergillosis, does not spread to other organ systems or the blood vessels. It most often affects middle-aged and elderly individuals, spreading to surrounding tissue in the lungs. The disease often does not respond to conventionally successful treatments, and requires individualized therapies in order to keep it from becoming life-threatening.

Did you know?

Your chance of developing a kidney stone is 1 in 10. In recent years, approximately 3.7 million people in the United States were diagnosed with a kidney disease.

Did you know?

Individuals are never “cured” of addictions. Instead, they learn how to manage their disease to lead healthy, balanced lives.

Plant apical meristems and the primary tissues they produce. Plant apical meristems and the primary tissues they produce.
El Niño and areas of high marine primary production around the Galapagos Islands. Noti El Niño and areas of high marine primary production around the Galapagos Islands. Noti
Preventive and Primary Care Services Preventive and Primary Care Services
Kitagawa Utamaro, Utamaro's Studio, Eshi . . . dosa-hiki (the three primary steps in producing ... Kitagawa Utamaro, Utamaro's Studio, Eshi . . . dosa-hiki (the three primary steps in producing ...
Abnormalities Caused by Cardiac Pathology Abnormalities Caused by Cardiac Pathology
A clogged PCV system caused the engine oil fumes to be drawn into the air cleaner assembly. This is ... A clogged PCV system caused the engine oil fumes to be drawn into the air cleaner assembly. This is ...
Video: Chemical Buffers - protein buffer, phosphate buffer system and bicarbonate buffer system

For a complete list of videos, visit our video library