Platelets

Question 1

Platelets are _

Answer 1

Cytoplasmic fragments

Question 2

Platelets are cytoplasmic fragments, able to survive in circulation for up to _ days

Answer 2

10

Question 3

Platelets formed in bone marrow by extremely large cells called _

Answer 3

Megakaryocytes

Question 4

Platelets are not cells as they don’t have _ and cannot _

Answer 4

Nucleus

Divide

Question 5

Outer membrane consists of _ which allow it to adhere only to injured surfaces

Answer 5

Glycoprotein surface coat

Question 6

Membrane contain large number of _ which play number of roles in clotting process

Answer 6

Phospholipids

Question 7

Cytosol (solution inside the membrane) contains _ including actin and myosin

Answer 7

Contractile protein

Question 8

Cytosine also contains (2)

Answer 8

Microfilaments

Microtubules

Question 9

_ in cytosol important for clot contraction

Answer 9

Contractile proteins

Question 10

_ contain a variety of hemostatically active compounds

Answer 10

Platelet granules

Question 11

Hemostatically active compounds in platelet granules released when _

Answer 11

Platelets are activated

Question 13

Hemostatically active compounds are _ which attract more platelets to the wound site

Answer 13

Potent aggregating agents

Question 14

Formation of platelet plug is a _ process

Answer 14

Self perpetuating

Question 15

In activated state, platelet develops _

Answer 15

Pseudopodia