Which of these makes up the greatest portion of whole blood by volume?

• erythrocytes  

• platelets  

• leukocytes  

• plasma

What is the Percentage Components of whole blood?

• 55% Plasma

  45% Erythrocytes

• 45% Plasma

  55% Erythrocytes

• 50% Plasma

  50% Erythrocytes

• 60% Plasma

  40% Erythrocytes

What is a hematocrit?

• A hematocrit is the percentage of plasma in a whole blood sample.

• A hematocrit is the percentage of all formed elements in a whole blood sample.

• A hematocrit is the percentage of erythrocytes in a whole blood sample.

• A hematocrit is the percentage of leukocytes and platelets in a whole blood sample.

Which of the following is NOT a formed element in whole blood?

• albumin

• leukocytes

• platelets

• erythrocytes

What triggers erythropoietin (EPO) release that leads to the production of new red blood cells?

• reduced availability of oxygen

• a high hematocrit

• too many platelets

• excess oxygen in the bloodstream

Tags

NGSS.HS-LS1-3

How many oxygen molecules can be transported by one hemoglobin molecule?

• two

• four

• eight

The cells responsible for producing platelets are called ________.

• monoblasts

• megakaryocytes

• myeloblasts

• lymphoid stem cells

What enzyme removes unneeded clots after healing has occurred?

• plasmin

• thrombin

• plasminogen

• fibrin

What protein involved in coagulation provides the activation for the final step in clotting?

• fibrin

• prothrombin activator

• thrombin

• fibrinogen

Which step of hemostasis involves activation of formed elements in the blood?

• vascular spasm

• platelet plug formation

• fibrin mesh formation

• fibrinolysis