Histology RAR

which one of the following is the lining of nasal vestibules ?

• Ps. str. columnar ciliated epithelium

• Str. sq. epithelium

• Str. col. epithelium

• Transitional epithelium

• Thin skin

which one of the following describe the olfactory sensory cells ?

• Unipolar neurons

• the dendrites pass to the corium

• contains yellowish pigment which is responsible for the yellow color of the olfactory area

• have axonal processes confined to the epithelium surface

• are associated with odor specific receptors

which one of the following separates the lamina propria of the trachea from the submucosa ?

• a complete layer of smooth muscle fibers

• a band of condensed fibre-elastic membrane

• a band of elastic fibre cartilage

• a c-shaped ring of hyaline cartilage

• irregular plates of hyaline cartilage

which of the following is a character of the intra-pulmonary bronchus ?

• wider than trachea & flattened posteriorly

• the mucosa is flattened all around

• complete muscle layer surround the mucosa

• the goblet cells are more numerous than that in the tracheal epithelium

• mucosa & serous glands are present in the submucosa

which of the following is a character of the bronchioles ?

• absence of goblet cells & abundance of Clara cells

• poorly developed muscle layer

• thick corium poor in elastic fibers

• glands & cartilage plates are present at the outer connective tissue layer

• lined by ciliated cells & goblet cells

which one of the following statements describe type-1 pneumocytes ?

• they are precursors of type II pneumocytes

• they have loose intercellular junction

• they represent 5% of the alveolar lining cells

• they are involved in production of surfactant

• they provide an extremely thin gas permeable barrier