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 72 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

Mochi

  • Member
  • Posts: 300
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

Only 12 hours after an egg cell is fertilized by a sperm cell, the egg cell starts to divide. As it continues to divide, it moves along the fallopian tube toward the uterus at about 1 inch per day.

Did you know?

It is important to read food labels and choose foods with low cholesterol and saturated trans fat. You should limit saturated fat to no higher than 6% of daily calories.

Did you know?

Hyperthyroidism leads to an increased rate of metabolism and affects about 1% of women but only 0.1% of men. For most people, this increased metabolic rate causes the thyroid gland to become enlarged (known as a goiter).

Did you know?

If all the neurons in the human body were lined up, they would stretch more than 600 miles.

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.

How plant cells take up and transform nitrate How plant cells take up and transform nitrate
Prostate cancer. In this example, a large mass has grown into the urinary bladder. Prostate cancer i Prostate cancer. In this example, a large mass has grown into the urinary bladder. Prostate cancer i
BLOOD CELLS BLOOD CELLS
Action of penicillinase. Action of penicillinase.
B Cells: Development of Self-Recognition and Self-Tolerance B Cells: Development of Self-Recognition and Self-Tolerance
Structure of hemoglobin, the oxygen-transporting protein of red blood cells. It consists of four glo Structure of hemoglobin, the oxygen-transporting protein of red blood cells. It consists of four glo
Video: Cardiac Cycle (Part 4 of 4)

For a complete list of videos, visit our video library