Functions of Epithelial Tissue

What is the primary function of epithelial tissue in the body?

• To provide structural support

• To act as a barrier and control permeability

• To store energy

• To transmit nerve impulses

Which of the following is a characteristic feature of epithelial cells?

• Random distribution of organelles

• Polarised distribution of organelles

• Lack of membrane-bound proteins

• Absence of a cell membrane

What role do cilia play in the epithelial cells lining the respiratory tract?

• They absorb nutrients

• They secrete hormones

• They move mucus and trapped particles

• They store fat

Which type of epithelium is responsible for secreting digestive enzymes in the small intestine?

• Ciliated epithelium

• Glandular epithelium

• Stratified epithelium

• Squamous epithelium

What is the function of the muco-ciliary escalator in the airways?

• To absorb oxygen

• To transport nutrients

• To sweep mucus and trapped particles towards the throat

• To produce red blood cells

Where are cilia located on epithelial cells?

• Basal surface

• Lateral surface

• Apical surface

• Internal surface

What happens to the materials transported by the nasal cilia?

• They are absorbed into the bloodstream

• They are expelled through the nose

• They are swallowed and end up in the stomach

• They are stored in the nasal cavity

Which of the following is NOT a function of epithelial tissue?

• Protection from physical wear and tear

• Secretion of mucus

• Conducting electrical impulses

• Selective transfer of materials

What structural feature allows epithelial cells to perform selective transport of molecules?

• Lack of a cell membrane

• Presence of microtubules

• Specialised membrane-bound proteins

• Random distribution of organelles

Which of the following best describes the role of glandular epithelium?

• To provide a rigid structure

• To facilitate gas exchange

• To contain many secretory cells

• To conduct nerve signals