Question

question 7
which of the following is not a formed element found in the blood?
red blood cell
white blood cell
plasma
platelet
question 8
all of the following are components critical to coagulation except
prothrombin.
thrombin.
fibrinogen.
fibrin.
none of the above; all of these components are critical to coagulation.
question 9
a type of abnormal heart sound that may signify incomplete closing of the valves is
myocardial infarction.
bradycardia.
a heart murmur.
tachycardia.

Explanation:

Question 7

Blood is composed of plasma (the liquid part) and formed elements (cellular components). Red blood cells, white blood cells, and platelets are all formed elements. Plasma is the fluid matrix of blood, not a formed element.

• Prothrombin is converted to thrombin.
• Thrombin acts on fibrinogen to form fibrin.
• Fibrin forms a mesh - like structure in coagulation. All these components (prothrombin, thrombin, fibrinogen, fibrin) are critical to the coagulation process.

• Myocardial infarction is tissue death in the heart due to lack of blood supply.
• Bradycardia is a slow heart rate.
• Tachycardia is a fast heart rate.
• A heart murmur is an abnormal heart sound that can be due to incomplete valve closure (among other causes).

Answer:

plasma

Question 8