Exam 20: Blood

Which is not a formed element of the blood?

Thrombocytes are involved with:

Match each term with its corresponding description. -granulocytes that release heparin (to prevent clotting)and histamine (important in inflammatory response)

The part of the hemoglobin molecule that combines with oxygen is the heme.

Explain why a rough surface such as gauze,the application of heat,or gently squeezing the tissue may be helpful in clot formation.

Considering only the blood antigens A,B,AB,and O,which blood type is considered the universal recipient? Explain the physiological basis of its being referred to as the universal recipient.

Which characteristic of blood makes it especially effective in temperature regulation?

Direct measurement of blood volume is usually not done on normal,healthy people.

Abou t of the mature red blood cell is made up of hemoglobin.

Which of the following substances is not secreted by platelets?

In the formation of red blood cells,polychromatic erythroblasts develop directly from basophilic erythroblasts.

Plasma is a dark red fluid that accounts for more than half the blood volume.

In the formation of red blood cells,reticulocytes develop directly from basophilic erythroblasts.

A person without A or B antigens on the red blood cells must have blood type O.

Platelets are important for blood clotting and hemostasis.

Blood plasma contains colloids,crystalloids,electrolytes,and nonelectrolytes.

Eosinophils are the least numerous of the white blood cells,numbering only 0.5% to 1% of the total leukocyte count.

People with type O blood are considered universal donors because their blood has Rh antigen on their red blood cells.

A drop in blood oxygen levels stimulates an increase in red blood cell formation.

Under the microscope,erythrocytes appear as: