AP5

Question 1

Blood consists of

Answer 1

approximately 55% plasma and 45% formed elements: erythrocytes (RBC), leukocytes (WBC), and platelets

Question 2

all of the formed elements are produced from

Answer 2

stem cells in red bone marrow

Question 3

Hemoglobin

Answer 3

erythrocyte modified for oxygen transport -> oxygen bound to pigmented protein

Question 4

5 types of leukocytes can be distinguished by

Answer 4

size, appearance of the nucleus, staining properties, presence or absence of visible cytoplasmic granules

Question 5

White blood cells are active in

Answer 5

phagocytosis (neutrophils/monocytes) and antibody formation (lymphocytes)

Question 6

Function of blood

Answer 6

transports nutrients and oxygen to body cells and to carry away carbon dioxide and metabolic wastes

Question 7

Plasma contains,

Answer 7

approx. 10% proteins, ions, nutrients, waste products, and hormones which are dissolved or suspended in water

Question 8

in heart, Blood is received by ___ and sent to circulation by ____

Answer 8

atria; ventricles

Question 9

Valve between atria and ventricle on right side

Answer 9

tricuspid

Question 10

Valve between atria and ventricle on left side

Answer 10

bicuspid

Question 11

Semilunar valves are found at

Answer 11

the entrances of the pulmonary trunk and the aorta

Question 12

Coronary arteries supply

Answer 12

blood to the heart muscle (myocardium)

Question 13

Blood drains from the myocardium

Answer 13

directly into the right atrium through the coronary sinus

Question 14

Heart beat initiated by the

Answer 14

SinoAtrial node and transmitted along a conduction system through the myocardium; measure by ECG

Question 15

Cardiac cycle

Answer 15

period from the end of one ventricular contraction to the end of the next ventricular contraction; systole then diastole

Question 16

Inferior and superior venae cavae

Answer 16

large veins that empty into the right atrium

Question 17

External respiration

Answer 17

the exchange of gases between the atmosphere and the blood through the alveoli

Question 18

Internal respiration

Answer 18

the exchange of gases between the blood and the body cells

Question 19

Inhalation

Answer 19

contraction of diaphragm

Question 20

Most of the oxygen in the blood is

Answer 20

bound to hemoglobin in RBCs

Question 21

when the concentration of oxygen drops,

Answer 21

oxygen is released from hemoglobin

Question 22

Regulator of blood ph

Answer 22

carbon dioxide