Prepare for NEET Biology Structural Organisation In Animals with MCQs & PYQs on NEET.GUIDE. Get free practice, previous year questions, and expert solutions for tissues and organ systems.
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.
A unique characteristic of cardiac muscle tissue, NOT found in skeletal or smooth muscle, is:
Presence of actin and myosin filaments.
Ability to contract involuntarily.
Striated appearance under a microscope.
Intercalated discs with gap junctions enabling synchronized contraction.
Which cell type is NOT derived from mesenchymal stem cells?
Chondrocytes
Osteocytes
Adipocytes
Keratinocytes
The specific type of collagen predominantly found in the basement membrane of epithelial tissues is:
Type I collagen
Type II collagen
Type III collagen
Type IV collagen
Which of the following is NOT a characteristic of neuroglia?
Supporting neurons
Insulating neurons
Conducting nerve impulses
Providing nutrients to neurons
Dense regular connective tissue, found in tendons and ligaments, primarily contains which type of fiber arrangement?
Randomly arranged collagen and elastic fibers
Parallel bundles of collagen fibers
A network of reticular fibers
Predominantly elastic fibers
Which statement regarding the basal lamina of epithelial tissue is INCORRECT?
It influences cell polarity.
It regulates cell proliferation and differentiation.
It is rich in reticular fibers.
It acts as a selective filter for molecules.
Cadherins are transmembrane proteins crucial for cell adhesion in epithelial tissues. Which type of junction are they MOST directly associated with?
Tight junctions
Gap junctions
Desmosomes
Adherens junctions
Which specific epithelial cell type is characterized by its ability to synthesize and secrete mucus?
Parietal cells
Chief cells
Goblet cells
Paneth cells
Metaplasia, a change in epithelial tissue type, can occur in response to chronic irritation. Which of the following is NOT a typical example of metaplasia?
Ciliated columnar epithelium of the bronchi changing to stratified squamous epithelium in smokers
Stratified squamous epithelium of the esophagus changing to columnar epithelium in Barrett's esophagus
Transitional epithelium of the bladder changing to stratified squamous epithelium due to increased urine flow
Glandular epithelium of the cervix changing to stratified squamous epithelium in response to chronic infection
