3-L1+

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What is the main function of the surface layer of cells in the epidermis?

To facilitate cell renewal
To induce cell death
To protect against water loss across the epithelium (correct)
To promote cell differentiation

What is the process by which cells become irregular in shape and flatten as they accumulate keratin?

Keratinization (correct)
Cell differentiation
Apoptosis
Cell renewal

Where is stratified cuboidal epithelium typically found?

In the skin
In the urinary bladder
In the small intestine
In the inner sides of pancreatic ducts and salivary glands (correct)

What is the function of microvilli in epithelial cells?

To increase the surface area of the cell surface (A) Signup and view all the answers

What is the name of the epithelium that lines the urinary bladder and parts of the ureters and urethra?

Transitional epithelium (Urothelium) (D) Signup and view all the answers

What is the function of the umbrella cells in the transitional epithelium?

To stretch the epithelium (B) Signup and view all the answers

What is the purpose of the keratin layer in the skin?

To protect the skin (D) Signup and view all the answers

What is the name of the process by which cells become thin, inactive, and lack nuclei?

Keratinization (B) Signup and view all the answers

What is a characteristic of stratified epithelial tissue?

It has more than one layer of cells (C) Signup and view all the answers

What is the function of cilia in epithelial cells?

To permit movement of materials over the surface of the epithelium (A) Signup and view all the answers

What is the purpose of occluding cell junctions?

To prevent diffusion of substances between adjacent cells (D) Signup and view all the answers

Where is cell division typically found in stratified epithelial tissue?

Near the basement membrane (A) Signup and view all the answers

What is the function of stratified squamous epithelium?

Protection (A) Signup and view all the answers

How do the cells change shape as they migrate towards the surface in stratified squamous epithelium?

They become flattened (B) Signup and view all the answers

What is the main difference between stratified squamous non-keratinized epithelium and stratified squamous keratinized epithelium?

The presence of keratin (B) Signup and view all the answers

Where is stratified squamous non-keratinized epithelium typically found?

In the lining of the mouth and esophagus (A) Signup and view all the answers

What is the purpose of keratin in stratified squamous keratinized epithelium?

To provide waterproofing and resistance to friction (B) Signup and view all the answers

What is the shape of the cells in the lower layers of stratified squamous epithelium?

Roughly polygonal (B) Signup and view all the answers

What is the primary function of the basal layers in stratified squamous epithelium?

To continually replicate and replace cells (B) Signup and view all the answers

How are cells lost at the surface of stratified epithelial tissue replaced?

Through cell replacement from underneath (B) Signup and view all the answers