The Skeletal Muscle Triad
a] The triad is made up of three components:
1] a T-Tubule (aka; Transverse Tubule) which is an invagination of the
sarcolemma which penetrates deep into the
2] and a pair of Terminal Cisternae flanking the t-tubule.
Parts of the Cell
The Nucleolus - a nonmembranous intranuclear organelle of the nucleus responsible for the
synthesis of rRNA and, of ribosomes.
b) The Ribosome
1) Ribosomes are small organelles being made up of two subunits.
a] These two subunits are com
Introduction to Muscle Tissue
a) The functional cellular component of muscle tissue is the muscle cell or
1) In all three classes of muscle tissue the myofiber synthesizes and maintains a
group of proteins responsible for the contractile nature
1] Eosinophils usually have bilobed nucleus and an abundance of orange-red
a The granules will obscure portions of the nucleus.
1 In some respects, these granules are like the typical lysosome in that they contain
Notes on the Matrix
The Ground Substance of the Matrix
a) The ground substance functions as a molecular sieve.
1) It facilitates the diffusion of metabolites between the blood and the
2) It acts as a physical barrier to prevent the spread of l
The Function of the Cell Membrane
1) Although the cell membrane serves as a barrier between the cell's external and
internal environments it is not totally impermeable. Instead the cell membrane is
a] Semipermeability means that the cell me
Overview of Histology Notes
a) Cytology is the study of the cell, the basic unit of life.
b) In unicellular organisms the cell must be able to perform all of the functions
essential for life.
c) In multicellular organisms cells can cooperate allo
Lecture on The Cell Membrane
a) The cell membrane is also known as the plasmallema or plasma membrane.
b) The cell membrane separates the cell from the external environment allowing it
to maintain it's own internal environment.
1) This is essential for th