2. CARDIAC AND RENAL: Electrical conduction system heart

Question 1

depolarization= ________. this leads to ________

Answer 1

positive ions come in; contraction (systole)

Question 2

repolarization leads to _____________

Answer 2

diastole

Question 3

fig. 19.11

Answer 3

k

Question 4

the cells that have fastest independent heart rate

Answer 4

sino atrial node cells

Question 5

the cells that depolarize first

Answer 5

sino atrial node cells

Question 6

Step 1:

Answer 6

sino atrial node depolarizes

Question 7

Step after sino atrial depolarization.What does this cause? What step # is this?

Answer 7

atrial depolarization; contraction; this is step 2

Question 8

Step after atrial depolarization. What happens?

Answer 8

Atrial ventricular node receives signal; it “holds” the signal for 100 milliseconds, then sends signal down atrialventricular bundle

Question 9

What happens after the signa is sent by the AV node?

Answer 9

it spreads up thru Purkinje fibers causing ventricular depolarization, which leads to contraction

Question 10

draw the progress of electrical conduction on a ECG wave

Answer 10

Numeral VII