Heart

Question 1

what are electrical impulses generated by?

Answer 1

ion movement

Question 2

to what is the chemical driving force directed

Answer 2

where the concentration is lower

Question 3

to what is the electrical driving force directed

Answer 3

from + to -

Question 4

Enernst

Answer 4

the movement of the ion inwards the cell equal the movement outwards

Question 5

SA-node

Answer 5

pacemaker, where the impulse starts, generates its own impulse

Question 6

AV-node

Answer 6

slows down impulse

Question 7

contractile muscle cells

Answer 7

cardiac myocytes

Question 8

gap-junctions

Answer 8

conduct impulses from cardiac myocyte to cardiac myocyte

Question 9

filling

Answer 9

blood moves towards ventricles, increasing volume and pressure

Question 10

isovolumic contraction

Answer 10

ventricles contract, pressure increases, volume stays the same

Question 11

ejection

Answer 11

ventricle contraction induces ejection, decreasing volume and changing pressure

Question 12

isovolumic relaxation

Answer 12

ventricles relax, pressure decreases and volume stays the same

Question 13

AV-valves

Answer 13

between atria and ventricles

Question 14

semilunar valves

Answer 14

pulmonary and aortic valve