Module 15:Blood & Cardiovascular

Question 1

What type of tissue is blood

Answer 1

Connective tissue

Question 2

What are the main components of plasma

Answer 2

water; it also contains proteins nutrients electrolytes hormones and gases

Question 3

What is The Buffy coat

Answer 3

A buff colored band that white blood cells and platelets form underneath the plasma

Question 4

Define Hematocrit

Answer 4

The percentage of cells in a blood sample

Question 5

Define Serum

Answer 5

Plasma without the clotting proteins

Question 6

Define Viscosity

Answer 6

How thick or sticky a fluid is

Question 7

Where is red bone marrow found? What cells does it produce?

Answer 7

Ends of long bone & in flat irregular bones. Produces all blood cells.

Question 8

What is Hemoglobin?

Answer 8

A red pigment that gives blood its color

Question 9

What is the lifespan of Red Blood Cells

Answer 9

120 daya

Question 10

Which organs contain phagocytic cells that engulf dead red blood cells

Answer 10

Liver and spleen

Question 11

What is another name for red blood cells?

Answer 11

Erythrocytes

Question 12

What is Erythropoiesis?

Answer 12

Production of new red blood cells through a negative feedback loop- this takes 3-5 days

Question 13

What is another name for platelets

Answer 13

Thrombocytes

Question 14

What do platelets play a key role in?

Answer 14

Stopping bleeding (hemostasis)

Question 15

What is Hemolysis

Answer 15

RBCs bursting and releasing their hemoglobin into the bloodstream

Question 16

What is the hearts own vascular system called

Answer 16

Coronary circulation

Question 17

What is the role of coronary arteries and cardiac veins

Answer 17

Arteries Deliver oxygenated blood to the myocardium and veins collect deoxygenated blood

Question 18

What is the coronary sinus

Answer 18

Most Cardiac veins empty here which gets returned to the right atrium

Question 19

What is collateral circulation

Answer 19

When new blood vessels develop to enroute blood flow around a blockage

Question 20

What does the P wave represent on an electrocardiogram

Answer 20

Atrial depolarization: the transmission of electrical impulses from the SA node through the Atria. This occurs right before the Atria contract.

Question 21

What does the PR Interval represent on an electrocardiogram

Answer 21

The time it takes for the cardiac impulse to travel from the Atria to the ventricles

Question 22

What does the QRS complex represent on an electrocardiogram

Answer 22

Ventricular depolarization: the spread of electrical impulses throughout the ventricles

Question 23

What does the ST segment represent on an electrocardiogram

Answer 23

the end of ventricular depolarization and the beginning of ventricular repolarization

Question 24

What does the T wave represent on an electrocardiogram ?

Answer 24

Ventricular repolarization

Question 25

What is Cardiac Output

Answer 25

The amount blood the heart pumps in one minute

Question 26

What is the equation for cardiac output

Answer 26

Heart rate x stroke volume

Question 27

What is stroke volume

Answer 27

The amount of blood ejected by the heart with each beat

Question 28

What is preload

Answer 28

The amount of tension or stretch in the ventricular muscle just before it contracts

Question 29

What is Contractility

Answer 29

The force with which ventricular ejection occurs

Question 30

What is Afterload

Answer 30

The forces the heart must work against to eject its volume of blood

Question 31

What is Starlings Law?

Answer 31

The more the ventricles stretched within limits the more forcefully it will contract

Question 32

Where does the superior vena cava receive blood from

Answer 32

Head shoulders and arms

Question 33

Where does The inferior vena cava receive blood from

Answer 33

Lower body

Question 34

What is the longest vein in the body

Answer 34

Great saphenous vein