The heart, part 2

Question 1

Arteriolar vasodilalation ____________ arterioles and _____________ arterial pressure and ____________

Answer 1

Dilating arterioles, decreases arterial pressure and peripheral resistance

Question 2

Baroreceptors

Answer 2

Stretch receptors that decrease blood pressure

Question 3

Hypothalamus, kidneys and blood pressure?

Answer 3

Kidneys release chemicals responsible for BP, hypothalamus controls new rates of blood flow

Question 4

ADH is released from _________ and affects ___________

Answer 4

Pituitary, kidneys

Question 5

Renin is released from _________ and affects ___________

Answer 5

kidneys, liver

Question 6

Aldosterone is released from _________ and affects ___________

Answer 6

Adrenal, kidney

Question 7

Angiotensin is released from _________, activated in the _________, and affects ___________, ____________, __________

Answer 7

liver, lungs, hypothalamus, adrenal, kidneys

Question 8

Action potential with heartbeat triggers _______________ and ____________, _______________

Answer 8

neurons and muscle cells, depolarizing

Question 9

Depolarizing

Answer 9

Negative to positive charge past threshold, causing voltage channels to open

Question 10

Pacemaker cells regulate _____________

Answer 10

Heartbeat

Question 11

______________ do not require stimulus because __________ come in to reach action potential regularly

Answer 11

Pacemaker cells, Na ions

Question 12

AV node delays to allow ____________ so _________________

Answer 12

atria/ventricles to contract at different times , blood can flow through chambers

Question 13

Fibrillation

Answer 13

Out of sync beating

Question 14

Defibrillator

Answer 14

Stops heart to allow cells to repolarize and reset

Question 15

CPR

Answer 15

Keeps blood flowing, doesn’t correct heart rhythm