Which of the following statements concerning blood is true? a. White blood cells

Question

Which of the following statements concerning blood is true? a. White blood cells outnumber red blood cells. b. Red blood cells function in immunity. c. All formed elements are produced in red bone marrow. d. Lymphocytes are the most numerous type of white blood cell. e. Platelets transport oxygen. The hematocrit, or packed cell volume, is the percentage of ___ in a volume of a blood sample. In this activity you will be using a heparinized capillary tube. What is the function of heparin? ___ In this activity the formed elements will be separated using what type of lab instrument? ___ Which three leukocyte types are classified as granulocytes? Which two leukocyte types are classified as agranulocytes? How does a granulocyte differ from an agranulocyte?

Explanation / Answer

activity 2 :

1 ans) hematocrit or packed cell is the percent of blood volume filled by erythrocytes and, thus, a measure of oxygen carrying capacity of the blood. If there are 100 ml of blood with a HCT of 45%, the erythrocytes occupy 45 ml.

2 ans)

generally Heparin is a naturally occurring anticoagulant produced by basophils and mast cells.In therapeutic doses, it acts as an anticoagulant, preventing the formation of clots and extension of existing clots within the blood. While heparin does not break down clots that have already formed it allows the body's natural clot lysis mechanisms to work normally to break down clots that have formed. Heparin is generally used for anticoagulation for the following conditions:

Heparin and its low-molecular-weight derivatives (e.g., enoxaparin, dalteparin, tinzaparin) are effective at preventing deep vein thromboses and pulmonary emboli in people at risk,but no evidence indicates any one is more effective than the other in preventing mortality.

activity 3 :

1 ans)  Granulocytes are a category of white blood cells characterized by the presence of granules in their cytoplasm.

There are three principal types of granulocytes, distinguished by their appearance under Wright's stain:

Their names are derived from their staining characteristics; for example, the most abundant granulocyte is the neutrophil granulocyte, which has neutrally staining cytoplasmicgranules.

2 ans) Agranulocytes, also known as mononuclear leukocytes, are white blood cells with a one-lobed nucleus. They are characterized by the absence of granules in their cytoplasm, which distinguishes them from granulocytes. Normal hematologic blood values of mononuclear leukocytes are about 35% of all white blood cells. The 2 types of agranulocytes in the blood circulation are lymphocytes and monocytes.A third type of agranulocyte, the macrophage, is formed in the tissue when monocytes leave the circulation and differentiate into macrophages.

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