HISTOLOGY LAB: Epithelial Tissue

Question 1

Identify the type of tissue composed of tightly packed cells covering body surfaces and lining internal organs, cavities, and ducts

Answer 1

Epithelial tissue, which provides protective barriers, controls permeability, and may have secretory or absorptive roles.

Question 2

Name the layer of the epidermis that contains basal cells, melanocytes, and Merkel cells, found at the deepest level.

Answer 2

The Stratum Basale, responsible for producing new keratinocytes and containing cells for pigmentation and sensory perception.

Question 3

Which layer of the epidermis contains keratinocytes that appear spiny and includes immune-response Langerhans cells?

Answer 3

The Stratum Spinosum, a layer with several layers of keratinocytes held together by desmosomes.

Question 4

What is the epidermal layer where keratinocytes start to flatten, organelles break down, and waterproofing lipids are released?

Answer 4

The Stratum Granulosum, marking the transition from active cells to dead surface cells.

Question 5

Identify the thin, clear epidermal layer found only in thick skin like palms and soles.

Answer 5

The Stratum Lucidum, which contains dead keratinocytes filled with eleidin, a precursor to keratin.

Question 6

Which is the outermost and thickest layer of the epidermis, consisting of dead, fully keratinized cells?

Answer 6

The Stratum Corneum, acting as a protective barrier against environmental damage, pathogens, and water loss.

Question 7

What type of epithelial tissue consists of a single layer of flat cells that line areas like alveoli and capillaries?

Answer 7

Simple squamous epithelium, providing a smooth surface for easy fluid movement.

Question 8

Name the epithelial tissue type that forms the lining of kidney tubules and gland ducts, featuring cube-shaped cells.

Answer 8

Simple cuboidal epithelium, specialized for secretion and absorption.

Question 9

Identify the tissue type that lines the stomach and intestines, consisting of a single layer of tall, column-shaped cells.

Answer 9

Simple columnar epithelium, which may include goblet cells for mucus secretion.

Question 10

Which epithelial tissue type has multiple layers of flat cells and forms the outer layer of the skin and mouth lining?

Answer 10

Stratified squamous epithelium, providing protection in high-abrasion areas.

Question 11

Describe the epithelium type that appears to have multiple layers due to staggered nuclei but is actually a single layer.

Answer 11

Pseudostratified columnar epithelium, often ciliated, and found in the respiratory tract for trapping and moving particles.

Question 12

What epithelial tissue is adapted for stretching and is found in the bladder?

Answer 12

Transitional epithelium, which allows for expansion and contraction of the urinary organs.

Question 13

Identify the epithelial cell type that is flat and thin, found in blood vessels and body cavities.

Answer 13

Squamous cells, providing a smooth, low-friction surface for fluid movement in structures like endothelium and mesothelium.

Question 14

Which type of epithelial cell is cube-shaped and commonly found in glandular ducts and kidney tubules?

Answer 14

Cuboidal cells, designed for secretion and absorption.

Question 15

Name the cell shape typical of epithelial cells lining the digestive tract, characterized by a tall, column-like structure.

Answer 15

Columnar cells, specialized for absorption and sometimes containing mucus-secreting goblet cells.

Question 16

What type of epithelium consists of a single layer of flat cells in areas like lung alveoli?

Answer 16

Simple squamous epithelium, suited for efficient gas exchange.

Question 17

Identify the epithelium type that features a single layer of cube-shaped cells with a spherical nucleus, found in exocrine glands and kidney tubules.

Answer 17

Simple cuboidal epithelium, serving in secretion and absorption.

Question 18

Describe the epithelium that lines the stomach and intestines, made of tall, narrow cells with elongated nuclei.

Answer 18

Simple columnar epithelium, which includes mucus-secreting goblet cells to protect mucous membranes.

Question 19

Which epithelium type includes multiple layers of cells with the surface layer being flat and scale-like, commonly found in the skin?

Answer 19

Stratified squamous epithelium, offering protective barrier functions.

Question 20

Name the epithelium that has several layers of cube-shaped cells, found in sweat glands and mammary glands.

Answer 20

Stratified cuboidal epithelium, providing protection and structural support.

Question 21

Identify the rare epithelial tissue with multiple layers of column-shaped cells, found in parts of the male urethra.

Answer 21

Stratified columnar epithelium, typically serving as a protective lining.

Question 22

Which epithelium appears to have multiple layers but is actually a single layer with nuclei at different levels, commonly found in the respiratory tract?

Answer 22

Pseudostratified columnar epithelium, which may have cilia to trap and move particles out of the respiratory system.

Question 23

What type of epithelium is specialized for stretching and lines organs like the bladder?

Answer 23

Transitional epithelium, which changes shape to accommodate expansion.

Question 24

Identify the type of stratified epithelium that becomes tough and waterproof due to keratin, often found in the skin.

Answer 24

Keratinized stratified squamous epithelium, forming a durable barrier against environmental damage.

Question 25

Which stratified epithelium remains moist and non-keratinized, found in areas like the esophagus and mouth?

Answer 25

Non-keratinized stratified squamous epithelium, which maintains a wet surface.

Question 26

Other name for transitional epithelium?

Answer 26

Uroepithelium

Question 27

Where can we find the transitional epithelium?

Answer 27

Bladder, ureter, and urethra