39. USHERS DUTIES 27) A Pastor should appoint a head usher and assistant ushers to ensure the smooth running of the weekly church services. James 2:1-4 describes a church usher who favoured a rich man and discriminated against a poor man.This is what an usher should not do.Ushersâ duties should be as follows: 1) Be given a key to open up the church; 2) Be at church at least 30 minutes before the starting time of the service.his is what an usher should not do. Ushersâ duties should be as follows: 1) Be given a key to open up the church; 2) Be at church at least 30 minutes before the starting time of the service.
Bone cells. Bone cells are arranged in concentric circles around longitudinal tubes called (Osteonic (haversion) canals) Bone cells (osteocytes) are arranged in concentric circles around the osteonic (Haversian) canals. (TRUE) Bone cells are also called osteocytes. (TRUE).one cells. Bone cells are arranged in concentric circles around longitudinal tubes called (Osteonic (haversion) canals) Bone cells (osteocytes) are arranged in concentric circles around the osteonic (Haversian) canals. (TRUE) Bone cells are also called osteocytes. (TRUE).
The history of research on adult stem cells began more than 60 years ago. In the 1950s, researchers discovered that the bone marrow contains at least two kinds of stem cells. One population, called hematopoietic stem cells, forms all the types of blood cells in the body.A second population, called bone marrow stromal stem cells (also called mesenchymal stem cells, or skeletal stem cells by some), were discovered a few years later.V. An adult stem cell is thought to be an undifferentiated cell, found among differentiated cells in a tissue or organ. The adult stem cell can renew itself and can differentiate to yield some or all of the major specialized cell types of the tissue or organ.