cardiovascular system

Question 1

what does the sinoatril (sa) node do?
slows action potential down
begins cardiac excitation
opens the coronary sinus
empties blood into the vessels

Answer 1

begins cardiac excitation

Question 2

At the atrioventricular (AV) node, what happens?

Answer 2

the action potential slows

Question 3

a single cardiac cycle includes all of the…

Answer 3

events associated with one heartbeat

Question 4

the term systole refers to the phase of…

Answer 4

contraction

Question 5

the term diastole refers to the phase of…

Answer 5

relaxation

Question 6

the term diastole refers to the phase of…

Answer 6

relaxation

Question 7

the cardiac cycle is divides into three phases. what are they?

Answer 7

relaxation period, atrial systole, ventricular systole

Question 8

blood is a liquid connective tissue that has 3 general functions. what are they?

Answer 8

transportation, regulation, protection

Question 8

blood is a liquid connective tissue that has 3 general functions. what are they?

Answer 8

transportation, regulation, protection

Question 9

Blood is thicker than water. true or false

Answer 9

true

Question 10

what is whole blood composed of?

Answer 10

blood plasma, formed elements

Question 11

hemopoiesis occurs in…

Answer 11

red bone marrow

Question 12

do red blood cells have a nuclei?

Answer 12

no

Question 13

the function of haemoglobin in red blood cells is to…
recycle haemoglobin
transport oxygen
produce more haemoglobin
get rid of haemoglobin

Answer 13

transport oxygen

Question 14

how long do red blood cells live?

Answer 14

120 days

Question 15

white blood cells are nucleated cells. true or false

Answer 15

true

Question 16

what is the function of a white blood cell?

Answer 16

to combat inflammation and infection

Question 17

how long to white blood cells usually live?

Answer 17

a few hours or a few days

Question 18

do platelets have a nuclei?

Answer 18

no

Question 19

what is haemostasis?
The format of prothrombinase
Blood clotting
A sequence of responses that stops bleeding when blood vessels are injured
A retracing blood clot that pulls the edges of the damaged vessels closer

Answer 19

A sequence of responses that stops bleeding when blood vessels are injured

Question 20

what do arteries do?

Answer 20

carry blood away from the heart to bodily tissues

Question 21

vasoconstriction

Answer 21

smaller

Question 22

vasodilation

Answer 22

increase

Question 23

what do arterioles do?

Answer 23

deliver blood to capillaries

Question 24

capillaries connect arterioles to...

Answer 24

venules

Question 25

what is cardiac output?

Answer 25

the volume of blood ejected per minute from the left ventricle into the aorta

Question 26

what is stroke volume?

Answer 26

the amount of blood ejected by the left ventricle during each beat

Question 27

How many chambers does the human heart have? four two six

Answer 27

four

Question 28

Which of these vessels carries deoxygenated blood from the heart? the pulmonary artery the pulmonary vein the aorta

Answer 28

the pulmonary artery

Question 29

Where does the right ventricle in the heart pump blood to? the left ventricle the lungs the rest of the body

Answer 29

the lungs

Question 30

Which blood vessel provides oxygenated blood? the pulmonary artery the aorta the vena cava

Answer 30

the aorta

Question 31

Which type of vessel contains valves? arteries lacteals veins

Answer 31

veins

Question 31

Which type of vessel contains valves? arteries lacteals veins

Answer 31

veins

Question 32

What is a network of capillaries called? a capillary system a capillary bed the vascular system

Answer 32

a capillary bed

Question 33

Which vessels supply the heart with blood? the coronary arteries the pulmonary artery the aorta

Answer 33

the coronary arteries

Question 34

Which type of vessel needs to withstand high blood pressure? an artery a vein a capillary

Answer 34

an artery

Question 35

Which type of vessel needs to withstand high blood pressure? an artery a vein a capillary

Answer 35

an artery

Question 36

Which of these vessels carries deoxygenated blood from the heart? the pulmonary artery the pulmonary vein the aorta

Answer 36

the pulmonary artery

Question 36

Which of these vessels carries deoxygenated blood from the heart? the pulmonary artery the pulmonary vein the aorta

Answer 36

the pulmonary artery

Question 37

Where does the right ventricle pump blood to? the left ventricle the lungs the rest of the body

Answer 37

the lungs

Question 37

Where does the right ventricle pump blood to? the left ventricle the lungs the rest of the body

Answer 37

the lungs

Question 38

What is plasma? a substance used in digestion the liquid component of blood the collective term for blood cells

Answer 38

the liquid component of blood

Question 39

What is the function of the blood-brain barrier? to allow objects to pass to brain cells to protect the brain from toxins to prevent nutrients loss

Answer 39

to protect the brain from toxins

Question 40

What is the function of the blood-brain barrier? to allow objects to pass to brain cells to protect the brain from toxins to prevent nutrients loss

Answer 40

to protect the brain from toxins

Question 41

What does the pulmonary vein supply the heart with? oxygenated blood from the lungs deoxygenated blood from the body oxygenated blood from the body

Answer 41

oxygenated blood from the lungs

Question 42

What heart chamber does the vena cava empty into? the right atrium the left atrium the right ventricle

Answer 42

the right atrium