Question

1. Hassall's or Thymic Corpuscles:

1. Are composed of concentrically arranged Reticular fibers.
2. Their center shows evidence of Keratinization.
3. Are of Nasopharyngeal origin.
4. All of the above are true.
5. Only b + c are true.

2. Hematopoietic functions of the Spleen include:

1. Production of Humoral antibodies.
2. Retrieval of the Iron from red cell Hemoglobin.
3. Proliferation of Lymphocytes.
4. All of the above are true.
5. Only b + c are true.

3. Osteoid is produced by:

1. Chondroblast.
2. Osteoblast.
3. Osteoclast.
4. None of the above is true.

Answer 1

1) Hassall's or Thymic Corpuscles "Are composed of concentrically arranged Reticular fibers".
{are structures found in the medulla of the human thymus, formed from eosinophilic type VI epithelial reticular cells arranged concentrically.)

2) "Retrieval of the Iron from red cell Hemoglobin." Is Hematopoietic functions of the Spleen.
( Main functions of spleen are ,
Clearance of microorganisms and particulate antigens from the blood stream

Synthesis of immunoglobulin G (IgG), properdin and tuftsin

Removal of abnormal red blood cells (RBCs)

Extramedullary hematopoiesis in certain diseases )

3) Osteoid is produced by "Osteoblast"
(Osteoblast, large cell responsible for the synthesis and mineralization of bone during both initial bone formation and later bone remodeling)