Cell Junctions and Tissues Quiz

Which type of cell junction is found in vertebrates and functions to seal cells together in an epithelium to prevent leaking from either side?

• Gap junctions

• Tight junctions

• Desmosomes

• Hemidesmosomes

What is the primary function of connective tissue in relation to epithelial tissues?

• To provide structural support to the epithelial tissues

• To link epithelial tissues to other tissues via a basement membrane

• To communicate signals between different tissues

• To contract and facilitate movement

Which of the following is NOT a type of tissue listed in the image?

• Cartilage

• Nerve

• Muscle

• Lymphoid

Adherens and focal adhesions are subtypes of which kind of cell junction?

• Occluding junctions

• Anchoring junctions

• Communicating junctions

• Tight junctions

Which type of junction is unique to plant cells?

• Tight junctions

• Gap junctions

• Plasmodesmata

• Septate junctions

Desmosomes and hemidesmosomes are based on which type of filament?

• Actin filament

• Intermediate filament

• Microtubules

• Myosin filament

What is the primary function of anchoring junctions in cells?

• To provide energy for cellular activities

• To aid in dispersing force across all cells

• To facilitate cell division

• To isolate cells from one another

Which proteins are used by adherens junctions and desmosomes to link cells together?

• Integrins

• Cadherins

• Plakoglobins

• Keratins

What is the role of myosin II in the context of actin filament-based anchoring junctions?

• It mediates the folding of an epithelial sheet into a tube during embryogenesis.

• It connects extracellular matrix to actin filament.

• It binds to actin in an ATP dependent manner to form filaments.

• It links intermediate (keratinous) filaments to dense plaque.

What is the difference between cell junctions and cell adhesion?

• Cell junctions are transient while cell adhesion is permanent.

• Cell junctions are for recognition while cell adhesion is for stability and communication.

• Cell junctions are permanent while cell adhesion is transient.

• Cell junctions are for energy transfer while cell adhesion is for force distribution.