The nurse is explaining the normal conduction pattern of the heart to an adolescent with a newly diagnosed congenital heart anomaly. The nurse tells the patient that what serves as the pacemaker for the heart?
A) The atrioventricular (AV) node
B) The bundle of His
C) The Purkinje fibers
D) The sinuatrial (SA) node
D
Feedback:
The SA node, which is located near the top of the right atrium, acts as the pacemaker of the heart. The SA node sends the signal to the AV node, and then to the bundle of His, and into the Purkinje fibers, but it is the SA node that sets the rate.
You might also like to view...
Which of the following is a true statement about differing health belief systems?
a. Personalistic or magicoreligious beliefs have been superseded in Western minds by biomedical principles. b. In most cultures, older adults are likely to treat themselves using traditional methods before turning to biomedical professionals. c. Ayurvedic medicine is another name for traditional Chinese medicine. d. The belief that health depends on main-taining a balance among opposite qualities is characteristic of a magicoreligious belief system.
During assessment of a client in the fourth stage of labor, the nurse observes a separation of the abdominis rectus muscle that is more than two fingers wide. Which of the following instructions should the nurse offer the client?
A) Perform regular exercises. B) Avoid lifting heavy objects. C) Sleep on a firm mattress. D) Avoid sleeping on her back.
An episode of asthma that does not respond to ordinary therapeutic measure is called:
What will be an ideal response?
In the United States, most citizens have access to clean water and sanitation services and often take these services for granted. Worldwide, however, clean water and sanitation are not standard
How many people worldwide in 2010 lacked access to improved water sources? A) 7 million B) 78 million C) 783 million D) 7.8 billion