Physiology lecture 6

HideShow resource information
What are the two groups of myocytes?
1) Work cells 2) Conduction cells/system
1 of 11
What do work cells do?
Generate force
2 of 11
What do conduction cells do?
The fast spread of electrical events throughout heart
3 of 11
Where does the initiation of the heart beat begin?
Sino atrial node (right atrium)
4 of 11
What are the two ways of the spread of excitation?
1) Cell --> cell via gap junctions 2) Via the specialised conducting fibres
5 of 11
Name 4 electrical conducting tissues
1) Sino-atrial node 2) Atrio ventricular node 3) Bundle of His 4) Purkinje fibres
6 of 11
Draw an electrocardiogram and label Q, R and S
(Draw electrocardiogram)
7 of 11
Draw the action potential in heart muscle and what is it called?
Trigger calcium, (Draw AP)
8 of 11
Name the two kinds of arrhythmias
1) Impulse propagation (conduction) 2) Impulse initiation
9 of 11
Describe what atrial fibrillation is
Due to damaged cells producing an abnormal firing of APs
10 of 11
Describe what ventricular fibrillation is
Ineffective contractions so blood flow stops (mot dangerous)
11 of 11

Other cards in this set

Card 2

Front

What do work cells do?

Back

Generate force

Card 3

Front

What do conduction cells do?

Back

Preview of the front of card 3

Card 4

Front

Where does the initiation of the heart beat begin?

Back

Preview of the front of card 4

Card 5

Front

What are the two ways of the spread of excitation?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all CVS 2 resources »