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NEET Questions / Zoology / Structural Organisation In Animals
Which statement regarding the specialized junctions between epithelial cells is INCORRECT?
Tight junctions facilitate communication between adjacent cells.
Adherens junctions contribute to the structural integrity of epithelial tissues.
Desmosomes provide strong adhesion between adjacent cells, using cadherins linked to intermediate filaments.
Gap junctions allow the passage of small molecules and ions between adjacent cells.
Gap junctions primarily facilitate:
Intercellular communication
Cellular adhesion
Extracellular transport
Protein synthesis
Which of the following molecules are MOST likely to pass through gap junctions?
Proteins
Carbohydrates
ions
DNA
The absence of functional gap junctions would MOST directly affect which cellular process?
Protein synthesis
DNA replication
Coordinated muscle contractions
Intracellular transport
Which statement BEST describes the function of gap junctions?
They prevent cell-to-cell contact.
They mediate communication through hormonal signals.
They enable direct cytoplasmic exchange between adjacent cells.
They are involved in cell division.
Histamine, serotonin and heparin are secreted by
Lymphocytes
Monocytes
Neutrophils
Basophils
Tissue is
A group of similar cells together with their associated cell intercellular substances which perform a specific function
A single cell with specified functions
Composed of a single layer with cube-like cells
None of the above
