Which of the following statements about platelets is INCORRECT?

Which of the following statements about platelets is INCORRECT?

- Platelets are essential for clotting process.
- Platelets are fragments of a larger cell called megakaryocyte.
- The life span of platelets is 30 to 60 days.
- The formation of platelets is regulated by the hormone thrombopoietin.
- Platelets contain serotonin, ADP, calcium and PDGF.



Answer: The life span of platelets is 30 to 60 days.

Which of the following is NOT a characteristic of blood?

Which of the following is NOT a characteristic of blood?

- Its temperature is slightly higher than the body's temperature.
- Blood is thicker than water.
- The pH of blood varies between 7.15 to 7.25.
- The color of blood varies from scarlet red to dark red.



Answer: The pH of blood varies between 7.15 to 7.25.

Which of the following is a protective function of blood?

Which of the following is a protective function of blood?

- Preventing infection
- Maintaining normal pH in the body
- Delivering oxygen from the lungs to all body tissues
- Maintaining normal body temperature
- Transporting hormones from endocrine organs to target tissues



Answer: Preventing infection

Which leukocyte contains histamine in its granules?

Which leukocyte contains histamine in its granules?

- Monocytes
- Basophils
- Neutrophils
- Eosinophils
- Lymphocytes



Answer: Basophils

When red blood cells transport respiratory gases

When red blood cells transport respiratory gases

- both oxygen and carbon dioxide combine to the globin portion.
- carbon dioxide binds to the heme portion and oxygen binds to the globin portion.
- both oxygen and carbon dioxide combine to the heme portion.
- oxygen binds to the heme portion while carbon dioxide binds to the globin portion.



Answer: oxygen binds to the heme portion while carbon dioxide binds to the globin portion.

The terms biconcave and anucleated apply to

The terms biconcave and anucleated apply to

- white blood cells.
- leukocytes.
- thrombocytes.
- red blood cells.
- platelets.



Answer: red blood cells.

The most numerous leukocyte is the

The most numerous leukocyte is the

- monocyte.
- neutrophil.
- basophil.
- lymphocyte.
- eosinophil.



Answer: neutrophil.

The final step in clot formation is

The final step in clot formation is

- fibrinogen ? fibrin.
- formation of prothrombin activator.
- platelet plug formation.
- prothrombin ? thrombin.
- the release of chemical by platelets.



Answer: fibrinogen ? fibrin.

Renal dialysis patients usually suffer from anemia because

Renal dialysis patients usually suffer from anemia because

- a large number of RBCs are lost with urine.
- the life span of RBCs is shorter in kidney failure patients.
- the failed kidney destroys large number of RBCs.
- their kidneys stop sending the chemical required to stimulate the red bone marrow to cause RBC to mature faster.
- the kidney fails to stimulate the red bone marrow.



Answer: their kidneys stop sending the chemical required to stimulate the red bone marrow to cause RBC to mature faster.

Pernicious anemia may result from

Pernicious anemia may result from

- rupture of red blood cells due to parasites.
- abnormal production of hemoglobin due to genetic defect.
- the lack of vitamin B12 in diet or deficiency of intrinsic factor needed to absorb B12.
- excessive bleeding.
- the absent or depressed synthesis of globin chains.



Answer: the lack of vitamin B12 in diet or deficiency of intrinsic factor needed to absorb B12.

Mature red blood cells in the circulating blood are filled with

Mature red blood cells in the circulating blood are filled with

- lysosomes.
- hemoglobin molecules.
- nuclei and all other cellular organelles.
- smooth endoplasmic reticulum.
- mitochondria.



Answer: hemoglobin molecules.

Granulocytes do NOT include

Granulocytes do NOT include

- basophils.
- neutrophils.
- PMN.
- monocytes.
- eosinophils.



Answer: monocytes.

During the life cycle of red blood cells,

During the life cycle of red blood cells,

- the globin portion of hemoglobin is degraded to bilirubin by the liver.
- RBCs are unable to synthesize proteins, grow, or undergo mitotic division.
- RBCs have life span of about 70 -80 days.
- the heme portion of hemoglobin is broken down to amino acids.
- old red blood cells are destroyed by the macrophages in the kidneys.



Answer: RBCs are unable to synthesize proteins, grow, or undergo mitotic division.

Diapedesis refers to

Diapedesis refers to

- the type of movement erythrocytes use in the tissue spaces.
- the escape of leukocytes from blood vessels into tissue spaces.
- the secretion of chemicals that trigger the inflammatory process.
- the chemical attraction leukocytes use to reach the site of tissue damage.
- the engulfing of foreign bodies by leukocytes.



Answer: the escape of leukocytes from blood vessels into tissue spaces.

Blood group O

Blood group O

- has the AB antigens on its plasma membrane.
- is a universal donor because they can give blood to all other groups.
- does NOT have the anti-A and anti-B antibodies in the serum.
- can receive blood from either group A or B but NOT from group AB.
- is a universal recipient because they can receive blood from all other groups.



Answer: is a universal donor because they can give blood to all other groups.

A major plasma protein that maintains the blood osmotic pressure is

A major plasma protein that maintains the blood osmotic pressure is

- globulin.
- fibrin.
- fibrinogen.
- angiotensinogen.
- albumin.



Answer: albumin.

A healthy adult male individual contains about ___ liters of blood.

A healthy adult male individual contains about ___ liters of blood.

- 1-2
- 5-6
- 7-8
- 2-3
- 3-4



Answer: 5-6