What is the primary function of gap junctions in cardiac cells?

Understanding Cardiac Electrophysiology

Interactive Video
•
Biology, Science
•
10th - 12th Grade
•
Hard

Liam Anderson
FREE Resource
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
To produce hormones
To store energy
To allow the movement of ions between cells
To provide structural support
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which node is responsible for generating the action potential in a normal heart?
AV node
Purkinje fibers
SA node
Bundle of His
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the initial voltage of the ventricular myocyte membrane action potential?
0 millivolts
20 millivolts
-70 millivolts
-90 millivolts
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
During which phase does sodium rapidly enter the cell, causing depolarization?
Phase 1
Phase 3
Phase 2
Phase 0
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which ion is primarily responsible for the rapid upstroke in the action potential?
Chloride
Potassium
Calcium
Sodium
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the main effect of sodium channel blockers on cardiac cells?
They slow down depolarization
They increase calcium influx
They enhance depolarization
They block potassium efflux
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What occurs during the plateau phase of the action potential?
The cell remains at rest
Calcium enters while potassium exits the cell
Only potassium exits the cell
Only sodium enters the cell
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