Cardiac 1

Question 1

Main purpose of circulatory system

Answer 1

circulation of blood, delivery of what the cell/tissue/body needs

Removal of what the cell/tissue/body doesn’t need

Question 2

4 parts of the cardiovascular system

Answer 2

Arteries- deliver blood from heart to tissues
Capillaries- where exchange occurs
Veins- return blood to the heart
Heart- pump!

Question 3

pulmonary circulation

Answer 3

Oxygenated blood leaves left heart to go to systemic circulation to deliver oxygen to tissues and take up carbon dioxide (at the tissue capillary bed)=

Systemic circulation

Question 4

Which is true?

All arteries carry oxygenated blood
All arteries carry blood away from the heart

Answer 4

All arteries carry blood away from the heart

Question 5

Central muscular pump 3 parts

Answer 5

• Vena Cava (venous return to the heart)
• 4 Chambered Heart
  - atria (conduit and booster filling functions)
  - Ventricles (pumping to pulmonary and systemic circulations)
• Pulmonary artery/Aorta (arterial delivery to circulations)

Question 6

Must contract to pump blood during systole and diastole (what do they do?)

Answer 6

Systole - heart muscles contract (out of the heart)
Diastole - heart muscles relax (atria to ventricles)

Question 7

Does systole (pumping) of the atria and ventricles occur at the same time or sequentially?

Answer 7

sequentially

Question 8

Atrioventricular valves (names and function)

Answer 8

– Separate atria from ventricles
– Tricuspid (right AV valve)
– Mitral (left AV valve)
– Open for ventricular filling (diastole)

Question 9

Semilunar Valves

Answer 9

Separate ventricle from great vessel
Pulmonic
Aortic
Open during ventricular pumping (systole) to deliver blood to pulmonary and systemic circulations

Question 10

An Spontaneous Central Muscular Pump that Doesn’t Require Conscious Control

Answer 10

Spontaneous depolarization at sinus node initiates events that results in mechanical pumping

Question 11

CV system has a central muscular pump with ___directional valves supporting forward blood flow

Answer 11

unidirectional

Question 12

Which valves close during systole

Answer 12

R and L AV valves (tricuspid and mitral)

Question 13

Which valves open during systole

Answer 13

pulmonary, aortic valves

Question 14

which valves close during diastole

Answer 14

pulmonic and aortic valves

Question 15

which valves open during diastole?

Answer 15

R and L AV valves (tricuspid and mitral)

Question 16

What tells the heart to beat?

Answer 16

autonomic influence and the sinus node - no nerves needed