Lecture 5

Question 1

The SA node is found

Answer 1

Between Epicardium & Endocardium

Question 2

Conduction pathway

Answer 2

Question 3

Question 4

Question 5

Question 6

Purkinje fibers transmitting impulse

Answer 6

to ventricle muscle cells

Question 7

Question 8

Autorhythmic cells

Answer 8

Question 9

Question 10

Question 11

Question 12

Events taking place during cardiac cycle:

Answer 12

Electrical signals and the ECG
Excitation-contraction coupling
Muscle contraction and relaxation
Pressure changes in the heart
Regulation of cardiac output

Question 13

Question 14

Membrane potential

Answer 14

Difference in charge between intracellular & extracellular fluid
Inside of the cell (usually negative) relative to outside

Question 15

Question 16

Question 17

Question 18

Question 19

Question 20

Question 21

Question 22

Question 23

Question 24

Question 25

Question 26

Question 27

Circus movements Arrhythmias e.g. Ventricular & Atrial fibrillation etc.

Question 28

Action potentials in the heart