Test I: Blood Composition

Question 1

Whole blood consists of:

Answer 1

formed elements and plasma

Question 2

Formed elements

Answer 2

Red blood cells (RBCs) or erythrocytes (99.9%)
White blood cells (WBCs) or leukocytes
Platelets

Question 3

Plasma consists of:

Answer 3

Water (92%)
Plasma proteins (7%)
Other solutes (1%)

Question 4

Hematocrit (H)

Answer 4

is the percentage of whole blood occupied by cellular elements

Question 5

shape of RBC’s

Answer 5

Biconcave disk-thin central region and thick outer margin.

Question 6

erythropoiesis

Answer 6

RBC formation that occurs in red bone marrow

Question 7

shape of WBC’s

Answer 7

Divided to granulocytes and agranulocytes

:

Question 8

shape of platelets

Answer 8

Flattened disks, round when viewed from above

Question 9

composition of platelets

Answer 9

They do not have a nucleus

They carry enzymes and other substances important for the process of blood clotting

Question 10

function of platelets

Answer 10

Transport chemicals for initiation and control of
clotting
Form temporary platelet plug in the walls of injured
blood vessels
Actively contract when the clot has been formed

Question 11

production of platelets

Answer 11

They live for 9-12 days

Produced in the bone marrow by magakaryocytes

Question 12

composition of wbc’s

Answer 12

They do have a nucleus. They contain vesicles and lysosomes

Question 13

function of wbc’s

Answer 13

Defend the body against invasion by pathogens

Remove toxins, waste, abnormal or damaged cells

Question 14

production of wbc’s

Answer 14

They survive from days (N) to months or years (L) Produced in the bone marrow. Ls also produced in lymphoid tissues

Question 15

composition of RBC’s

Answer 15

Only organelles related to transport of respiratory gases. Hemoglobin (Hb) accounts for 95% of the cell’s intracellular proteins

Question 16

production of RBC’s

Answer 16

No nuclei or ribosomes, so they cannot divide or produce their own proteins. Life span ~120 days

Question 17

function of RBC’s

Answer 17

carries oxygen