HISTOLOGY LECTURE

The thick myofilament is made up of this protein.

• Myosin

• Actin

• Troponin

• Tropomyosin

This region in sarcomere is occupied primarily by the thick myofilament.

• A-band

• I-band

• H-band

• M-band

This region in a sarcomere is occupied by the protein Myomesin.

• M-Line

• Z-Line

• H-band

• A-Band

This region in a myofibril from one Z-line to another Z-line is the smallest contractile unit of skeletal & cardiac muscle tissue

• Sarcosome

• Sarcomere

• Sarcolemma

• Sarcoplasm

The smooth endoplasmic reticulum of skeletal and cardiac muscle tissue has this specialized name

• Sarcosome

• Sarcomere

• Sarcolemma

• Sarcoplasmic Reticulum

These multipotent cells are found in connective tissue of the umbilical cord

• Fibroblasts

• Fibrocytes

• Mesenchymal cells

• Adipocytes

In connective tissue proper found in adults, these are the active cells that synthesizes the precursor for collagen fibers, as well as the components of the extracellular matrix.

• Fibroblasts

• Mesenchymal cells

• Fibrocytes

• Adipocytes

These fixed cells of the connective tissue are filled with secretory granules that almost obscures the nucleus of the cells. These granules in turn contains molecules that are involved in allergic reactions.

• Fibroblasts

• Fibrocytes

• Mast Cells

• Adipocytes

The following are wandering cells of the connective tissue, except:

• Mast Cells

• Inflammatory Macrophages

• Lekocytes

• Plasma Cells

This region in a sarcomere is occupied primarily by the thin myofilament

• A-Band

• I-Band

• H-Band

• M-Band