Q. Why is amoeba called acellular?
Because the entire body is made up of a single cell and all the vital functions are performed by it.
Q. Define a tissue?
A group of cells having identical structure, function and origin.
Q. What is a simple tissue?
In a simple tissue there will be only one kind of cells.
Q. What is a complex tissue?
A complex tissue has more than one kind of cells.
Q. What is histology?
Histology deals with the study of tissues.
Q. What is an epithelial tissue?
It may be defined as a tissue comprised of one or more layers of cells covering the external or internal surface of the body or may be embryologically derived from such a surface.
Q. Which tissue lines the interior of blood vessels?
Endothelium lines the interior of the blood vessels.
Q. What is germinal epithelium?
Germinal epithelium helps in the production of egg sperm cells.
Q. Name the different types of simple epithelium ?
Simple squamous epithelium, cuboidal epithelium, columnar epithehum and ciliated epithelium.
Q. What is a brush bordered epithelium?
The cells of cuboidal epithelium which have numerous finger like projections arc referred to as brush bordered epithelium.
Q. What are microvilli?
The finger like projections produced from the cuboidal cells or urinary tubules arc called microvilli.
Q. Name any two places where cuboidal epithelium is present?
Thyroid follicles, urinary tubules etc.
Q. Which tissue is found in the innter lining of the Bowmann’s capsule?
Simple squamous epithelium.
Q. Name the tissue that is found in the alveoli of lungs?
Simple squamous epithelium.
Q. What is the name of projections found in the urinary tubules?
Q. Where do you find germinal epithelium?
In reproductive organs.
Q. What are goblet cells?
The mucus secreting cells present between the columunar epithelium cells that line the stomach and the intestine are called goblet cells.
Q. What is the secretion of goblet cells?
Q. Where do you find goblet cells?
Present between the columnar epithelium cells of the lining of stomach and intestine.
Q. What is the function of microvilli in small intestine?
They help in the absorption of water and digested food.
Q. Name the projections found in the inner wall of small intestine?
Q. What is a cilium?
Thin elongated cytoplasmic process coming out of the epithelium is
called a cilium.
Q. What is the function of cilia found in epithelial cells?
The cilia have beating action as a result of the which the mucus and other substances are transfered over the epithelium from one place to another.
Q. What is a glandular epithelium?
These are epithelial cells specialised for the secretion of chemical substances like mucus, enzymes or hormones.
Q. Which are the two basic types of glandular epithelium?
Unicellular glands and multicellular glands.