30 Questions
What is the fundamental concept of the Cell Theory?
Cells are the fundamental units of all living things
Which type of cell junction allows the passage of small molecules and ions between cells?
Gap Junctions
What is the primary function of Membrane Flow?
To enable cells to grow, mature, and respond to environmental stimuli
Which type of cell junction is found in the cells that line the digestive tract?
Tight Junctions
What is the primary function of desmosomes in cells?
To link membranes and facilitate cell attachment
What is the term for the areas of the membrane that attach a cell to another cell or extracellular matrix?
Cell Junctions
What is a characteristic of epithelial tissues that allows them to regenerate when damaged?
The presence of stem cells
What is the role of Connexons in Gap Junctions?
To align and allow the passage of small molecules and ions between cells
What is the term for the surface of an epithelial cell that faces the exterior of the body?
Apical surface
What is the term for the thin layer of tissue that attaches to the basal surface of epithelial cells?
Basement membrane
What determines the classification of epithelial tissues?
Both the number of layers and shape of cells
What is a characteristic of simple epithelium?
It has only one layer of cells
Where can stratified epithelium be found in the body?
Only in protected areas inside the body
What is the characteristic of simple squamous epithelium?
It is thin, flat, and irregular in shape
What is the function of stratified squamous epithelium?
To resist mechanical or chemical stress
What is the characteristic of cuboid epithelial cells?
They are hexagonal in shape
Where can simple cuboid epithelial cells be found?
In the kidney tubules
What is the characteristic of columnar epithelial cells?
They are taller than they are wide
What is the primary function of Simple Columnar Epithelial Cells?
To facilitate absorption or secretion in certain areas
What is the main characteristic of Stratified Columnar Epithelia?
They are rare and found in the pharynx, urethra, and anus
What is the primary difference between Exocrine and Endocrine glands?
The method of secretion
What type of glands produce serous secretions that typically contain enzymes?
Serous Glands
What is the function of Fixed cells in Connective Tissue?
To provide structural support and maintenance to local tissues
What is the characteristic of Fluid Connective Tissue?
It contains a fluid matrix called plasma
What is the main characteristic of cartilage that distinguishes it from other types of supporting connective tissue?
It is avascular due to the presence of a chemical that discourages blood cell formation
Which type of bone tissue contains blood vessels within the matrix?
Compact
What is the unique characteristic of muscle tissue that allows it to contract?
The ability to shorten its cells along the longitudinal axis
What is the majority of nervous tissue in the body concentrated in?
The brain and spinal cord
What is the term for the membrane of a muscle cell?
Sarcolemma
What is the main function of neuroglia cells in nervous tissue?
To provide support to neurons
Test your knowledge of the cell theory, including the three basic concepts and the functions of membranous organelles. Learn about the building blocks of life and how cells carry out essential functions.
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