Histology & Epithelial Tissue MCQ Practice Set (18 Questions)

What is the primary focus of histology?

• The study of organ systems and their functions.

• The analysis of blood composition and diseases.

• The microscopic study of tissues and their organization.

• The examination of bone structure and development.

Which of the four main tissue types is responsible for binding, supporting, and protecting organs?

• Epithelial tissue

• Connective tissue

• Muscle tissue

• Nervous tissue

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

• Absorption of nutrients

• Transmission of electrical impulses across long distances

• Secretion of hormones and enzymes

• Protection from mechanical injury

Epithelial tissue is described as "avascular." This means it:

• Contains a rich network of capillaries.

• Is highly permeable to fluids.

• Lacks blood vessels within the tissue itself.

• Is the main site of blood cell production.

The basement membrane is a defining feature of which tissue type?

• Muscle tissue

• Epithelial tissue

• Nervous tissue

• Connective tissue

What does "polarity" refer to in the context of epithelial cells?

• Their ability to generate electrical currents.

• The structural and functional differences between their apical and basal surfaces.

• Their capacity to divide and regenerate.

• Their origin from different embryonic germ layers.

Which type of cell junction forms a tight seal, preventing the passage of molecules between adjacent cells?

• Gap junction

• Desmosome

• Tight junction (Zonula Occludens)

Which junction is characterized by connexons forming direct channels between the cytoplasm of two cells?

• Hemidesmosome

• Gap junction

• Tight junction

• Desmosome

Desmosomes (Macula Adherens) are crucial for resisting mechanical stress. Which cytoskeletal element are they primarily attached to?

• Microtubules

• Intermediate filaments (e.g., keratin)

• Actin filaments (Microfilaments)

• Myosin filaments

A patient has a condition where skin layers easily separate upon friction. Which cell junction is most likely deficient?

• Gap junctions

• Desmosomes

• Tight junctions

• Hemidesmosomes