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

Author Question: Which of the following cardiac cells has the slowest action potential? a. Atrial c. Purkinje ... (Read 22 times)

Jramos095

  • Hero Member
  • *****
  • Posts: 528
on: Jul 16, 2018
Which of the following cardiac cells has the slowest action potential?
 
  a. Atrial c. Purkinje fiber
  b. Ventricular d. Sinoatrial node

Question 2

Electrical stimulation of a cardiac muscle cell is the definition of which of the following?
 
  a. Contraction c. Polarization
  b. Refraction d. Depolarization


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

daiying98

  • Sr. Member
  • ****
  • Posts: 354
Reply #1 on: Jul 16, 2018
Answer to Question 1

ANS: D
The slope of phase 0 of the sinoatrial node (pacemaker) is less than those of the atrial, ventricular, and Purkinje fiber action potentials, and the former often is referred to as a slow action potential, whereas the latter are called fast action potentials.

Answer to Question 2

ANS: D
The action potential begins when the cell membrane of the excitable cell is exposed to a depolar-izing current and eventually reaches its excitation threshold potential. This is known as depolari-zation.


Jramos095

  • Member
  • Posts: 528
Reply 2 on: Jul 16, 2018
Wow, this really help

FergA

  • Member
  • Posts: 352
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

In 2012, nearly 24 milliion Americans, aged 12 and older, had abused an illicit drug, according to the National Institute on Drug Abuse (NIDA).

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?

Computer programs are available that crosscheck a new drug's possible trade name with all other trade names currently available. These programs detect dangerous similarities between names and alert the manufacturer of the drug.

Did you know?

On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.

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.

ON and OFF Ganglion Cells ON and OFF Ganglion Cells
Mechanisms of action of antifungal drugs. Mechanisms of action of antifungal drugs.
B and T Cells B and T Cells
T cells are of three general types: (1) helper T cells that secrete cytokines, which upregulate the ... T cells are of three general types: (1) helper T cells that secrete cytokines, which upregulate the ...
standard reduction potential (Eo), the greater the tendency of the oxidized form of a redox couple standard reduction potential (Eo), the greater the tendency of the oxidized form of a redox couple
Action Potentials in Mechanoreceptors Action Potentials in Mechanoreceptors
Video: DNA Sequences - Dideoxy Sequencing

For a complete list of videos, visit our video library