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 40 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?

A serious new warning has been established for pregnant women against taking ACE inhibitors during pregnancy. In the study, the risk of major birth defects in children whose mothers took ACE inhibitors during the first trimester was nearly three times higher than in children whose mothers didn't take ACE inhibitors. Physicians can prescribe alternative medications for pregnant women who have symptoms of high blood pressure.

Did you know?

The oldest recorded age was 122. Madame Jeanne Calment was born in France in 1875 and died in 1997. She was a vegetarian and loved olive oil, port wine, and chocolate.

Did you know?

The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.

Did you know?

Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.

Did you know?

Thyroid conditions may make getting pregnant impossible.

Sieve-tube elements and companion cells in phloem tissue Sieve-tube elements and companion cells in phloem tissue
Human immunodeficiency virus gains entry into helper T cells, uses the cell DNA to replicate, interf Human immunodeficiency virus gains entry into helper T cells, uses the cell DNA to replicate, interf
Embryonic cells form the placenta Embryonic cells form the placenta
Time-course of reprogramming mouse fibroblasts into induced pluripotent stem cells Time-course of reprogramming mouse fibroblasts into induced pluripotent stem cells
figure 18-1 pituitary hormones figure 18-1 pituitary hormones
Digestion converts whole foods into individual nutrients that can be used by the body’s cells Digestion converts whole foods into individual nutrients that can be used by the body’s cells
Video: Barriers - eye structures, digestive mucosa, respiratory mucosa & genitourinary mucosa

For a complete list of videos, visit our video library