Reference no: EM133933839

Question1.

1. During platelet activation, ___

a. aggregation is all that is needed to form a platelet plug

b. adherence is all that is needed to form a platelet plug

c. adherence, aggregation, then degranulation is the order of plug formation

d. adherence, degranulation for further recruitment, then aggregation is the order of plug formation

2. Normally, circulating platelets ____

a. are kept inactive by the endothelium secretion of nitric oxide and a prostaglandin

b. are absent from the blood stream, until needed.

c. Both a and b.

3. Platelet adherence _____

a. Can be responsible to exposed collagen fibers and von Willebrand's factor.

b. Requires degranulation

c. Requires Factor VIII eight

d. Requires Factor X ten

4. During platelet degranulation, ____

a. Serotonin maintains the localized vasoconstriction during a bleed

b. Norepinephrine slows down heart rate during a bleed

c. Acetylcholine increases force of cardiac concentration

Question 2

1. During platelet aggregation, ___

a. Platelets form a floating plug that then drops into place at the hole in the vessel

b. Receptors and fibrinogen link recruited platelets to the first layer of platelets to form an adequately sized plug

c. ADP and receptors for TxA2 link recruited platelets to the first layer of platelets to form an adequately sized plug.

d. A fibrin net forms in response to thromboxane A2

2. After an unsuitable platelet plug forms, ____

a. Coagulation begins

b. Primary hemostasis begins

c. Fibrinolysis begins

d. Factor X immediately converts plasminogen to plasmin

3. Tiny dermal capillaries hemorrhaging, pinpoint to large areas are ___

a. Petechiae

b. Purpura

c. Both a and b

d. None of the above

4. Broken dermal capillaries associated with an adverse drug reaction such a to a blood thinner is ___

a. Allergic purpura

b. Scurvy

c. Senile purpura

d. Corticosteroid purpura

Question 3.

1. Which is FALSE about red blood cells

a. People living for some time at high altitude will have more red blood cells than people living at sea level.

b. The average woman has more red blood cells than the average man

c. There are roughly 250 million hemoglobin molecules in one red blood cell.

d. There are 4-6 million red blood cells per mm cubed in the average male or female

2. Platelets ____

a. are whole nucleated cell

b. are housed in the lymph nodes

c. are fragments of megakaryocytes

d. do not have any receptors or granules of biochemicals.