blood components

Question 1

composition of blood

Answer 1

55% plasma 45% cellular components

Question 2

composition of plasma

Answer 2

90% water, plasma proteins, digested food, metabolic waste, dissolved mineral salts, hormones

Question 3

composition of cellular components

Answer 3

rbcs, wbcs, platelets

Question 4

structure of rbc: biconcave disc shape. func?

Answer 4

incr sa:volume, incr rate of absorption of o2 into cells

Question 5

structure of rbc: flexible and elastic cell membrane. func?

Answer 5

change shape to squeeze through c

Question 6

structure of rbc: haemoglobin. func?

Answer 6

allows binding of o2, enables trasnport from lungs to cells

Question 7

types of wbcs:

Answer 7

lymphocyte, phagocyte

Question 8

lymphocyte structure:

Answer 8

spherical nucleus, small amt of granular cytoplasm

Question 9

lymphocyte func:

Answer 9

produce antibodies –> kill bacteria & neutralise toxins

Question 10

what produces antibodies

Answer 10

lymphocytes

Question 11

phagocyte structure:

Answer 11

lobed nucleus, granular cytoplasm

Question 12

phagocyte func:

Answer 12

egulf, ingest digest foreign particles

Question 13

t/f: lymphocytes digest foreign particles

Answer 13

f

Question 14

t/f: phagocytes produce antibodies

Answer 14

f

Question 15

main func of wbcs:

Answer 15

protects body against foreign microbes + toxins

Question 16

main func of rbcs:

Answer 16

transports o2

Question 17

phagocytosis:

Answer 17

process of engulfing & ingesting foreign particles

Question 18

blood clotting process

Answer 18

1. damaged tissue & platelets release thrombokinase
2. inactive prothrombin is activated into active thrombin with help of thrombokinase & calcium ion
3. soluble fibrinogen is activated into insoluble fibrin threads with help of thrombin & vitamin k

Question 19

adv of blood clotting

Answer 19

prevents person from bleeding to death, prevents foreign substances from entering bloodstream (bacteria etc) causing infection

Question 20

platelets distribution

Answer 20

sparsely distributed in plasma

Question 21

platelets are made up of:

Answer 21

cell fragments formed in cytoplasm of certain bone marrow cells