Q:

What feature distinguishes pacemaker cardiac cells from other myocardial cells? Pacemaker cells:

waelhammad
Save to bookmark
|
2022-10-18
|
  129 
0

What feature distinguishes pacemaker cardiac cells from other myocardial cells? Pacemaker cells:

  1. require a stimulus from the vagus nerve in order to reach threshold, myocardial cells do not.
  2. reach threshold with much weaker stimuli than myocardial cells.
  3. have gap junctions, while myocardial cells do not.
  4. spontaneously generate action potentials, while myocardial cells do not.
Medicine, textbook solutions, MCQ Questions, Medicine textbook-solutions, Medicine MCQ-questions,
login and add your own answer to this question

All Answers

waelhammad
2022-10-18
need an explanation for this answer? contact us directly to get an explanation for this answer

D: Pacemaker cells (generally in the SA node) generate action potentials 80–100 times per minute even without neural input. Neural input will slow or increase this rate. Myocardial cells are not autorhythmic.

need an explanation for this answer? contact us directly to get an explanation for this answer

total answers (1)

Similar questions

need a help?

find thousands of online teachers now