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Read the following statements
I.Cilia in ciliated epithelium arises from apical granules
II. Ciliary movements maintain a flow of mucus or liquid constantly in one direction
III. Mucus containing goblet cells are absent from the ciliated epithelium.
IV. Eustachian tube is lined by stratified ciliated epithelium.
Choose the correct option with all correct statements.
I and II
II, III and IV
I, III and IV
II only
Answers (1)
Simple Ciliated Epithelium:
Structure
- The cells of ciliated epithelium bear numerous hair-like outgrowths called cilia. These arise from basal granules.
- In ciliated epithelium, mucus containing goblet cells are also found.
- The cilia undergo rhythmic contractions and create a current to transport material.
Ciliated epithelium is of two types :
(a). Ciliated columnar epithelium- This epithelium consists of cilia containing column-like cells.
(b). Ciliated cuboidal epithelium- It consists of cube-like cells having cilia on their free surfaces.
Location:
- Ciliated columnar epithelium lines respiratory tract, fallopian tubes, ventricles of the brain, central canal of the spinal cord, tympanic cavity of the middle ear and auditory tube (Eustachian tube).
- Ciliated cuboidal epithelium occurs in certain parts of nephrons of the kidney.
Cilia in ciliated epithelium arises from basal granules. Mucus containing goblet cells are present in the ciliated epithelium. Eustachian tube is lined by simple ciliated epithelium.
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