Epithelial tissue — key characteristic?
Tightly packed, minimal extracellular matrix.
Pseudo-stratified epithelium — appearance?
Looks stratified, but is a single cell layer.
Endocrine glands — secretion method?
Secrete hormones directly into bloodstream.
Squamous epithelium — cell shape?
Flat, scale-like cells.
Testicular tubules — function?
Site of sperm production.
Urothelium — location?
Lines urinary bladder, ureters, urethra.
Cell junctions — types?
Tight, gap, desmosomes.
Cilia and microvilli — roles?
Cilia move fluids; microvilli increase absorption surface.
Basement membrane — composition?
Lamina lucida, lamina densa, reticular layer.
Epithelial functions — main roles?
Protection, absorption, secretion, filtration.
Epithelial polarity — significance?
Allows directional functions like absorption.
Pseudo-stratified epithelium — location?
Respiratory tract and male reproductive system.
Endocrine glands — example?
Thyroid, adrenal, pituitary.
Squamous epithelium — protective role?
Forms a barrier against mechanical stress.
Testicular tubules — supporting cells?
Sertoli cells.
Urothelium — stretchability?
Highly stretchable to accommodate urine volume.
Cell junctions — function?
Maintain tissue integrity and communication.
Cilia — structure?
Microtubule-based, motile projections.
Microvilli — structure?
Actin-supported projections for absorption.
Basement membrane — role?
Supports and regulates epithelial cells.
Answer 10 questions on Epithelial Tissue Structure and Function.
1. Which of the following best describes the fundamental characteristics of epithelial tissue?
2. In which of the following locations is pseudo-stratified columnar epithelium primarily found?
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