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

Author Question: Which letter in the figure identifies the cardiac cells through which there is a 100-ms delay? a. ... (Read 29 times)

kamilo84

  • Sr. Member
  • ****
  • Posts: 495
on: Jul 16, 2018
Which letter in the figure identifies the cardiac cells through which there is a 100-ms delay?
 
  a. A c. C
  b. B d. D

Question 2

The fourth intercostal space at the left sternal margin is the site for which of the following elec-trocardiogram leads?
 
  a. V1 c. V3
  b. V2 d. V4


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

mtmmmmmk

  • Sr. Member
  • ****
  • Posts: 335
Reply #1 on: Jul 16, 2018
Answer to Question 1

ANS: D
As the electrical impulse travels through the atrioventricular node, there is a 100-ms delay in the conduction. This allows the atria to become fully depolarized and contract before ventricular ex-citation begins. This allows the atrial contraction and emptying to contribute optimally to ventric-ular filling.

Answer to Question 2

ANS: B
V2 is placed in the fourth intercostal space, at the right sterna margin.


kamilo84

  • Sr. Member
  • ****
  • Posts: 495
Reply #2 on: Jul 16, 2018
Correct answers!


mtmmmmmk

  • Sr. Member
  • ****
  • Posts: 335
Reply #3 on: Jul 16, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

No drugs are available to relieve parathyroid disease. Parathyroid disease is caused by a parathyroid tumor, and it needs to be removed by surgery.

Did you know?

It is widely believed that giving a daily oral dose of aspirin to heart attack patients improves their chances of survival because the aspirin blocks the formation of new blood clots.

Did you know?

The most common childhood diseases include croup, chickenpox, ear infections, flu, pneumonia, ringworm, respiratory syncytial virus, scabies, head lice, and asthma.

Did you know?

Signs of depression include feeling sad most of the time for 2 weeks or longer; loss of interest in things normally enjoyed; lack of energy; sleep and appetite disturbances; weight changes; feelings of hopelessness, helplessness, or worthlessness; an inability to make decisions; and thoughts of death and suicide.

Did you know?

Drugs are in development that may cure asthma and hay fever once and for all. They target leukotrienes, which are known to cause tightening of the air passages in the lungs and increase mucus productions in nasal passages.

The anterior pituitary is sometimes called the master gland because it secretes many hormones that r The anterior pituitary is sometimes called the master gland because it secretes many hormones that r
Larynx, trachea, bronchi, and lungs with an expanded view showing the structures of an alveolus and Larynx, trachea, bronchi, and lungs with an expanded view showing the structures of an alveolus and
Pericardial effusion: A, normal pericardial sac; B, pericardial sac with excess fluid possibly causi Pericardial effusion: A, normal pericardial sac; B, pericardial sac with excess fluid possibly causi
Cardiac pacemaker. The pacemaker device is implanted beneath the skin near the heart, and the electr Cardiac pacemaker. The pacemaker device is implanted beneath the skin near the heart, and the electr
Normal red blood cells (RBCs) are flexible and donut-shaped and move with ease through blood ... Normal red blood cells (RBCs) are flexible and donut-shaped and move with ease through blood ...
Details of two hair cells Details of two hair cells
Video: Lipid catabolism - lipolysis and beta oxidation and oxidation of fatty acids

For a complete list of videos, visit our video library