A. Simple squamous epithelium is a true single-layer tissue with flat cells.
B. Simple cuboidal epithelium is a true single-layer tissue with cube-shaped cells.
C. Simple columnar epithelium is a true single-layer tissue with tall cells.
D. Pseudostratified columnar epithelium appears multilayered but is actually a single layer with irregularly sized cells. It is not classified as a true simple epithelium despite being one cell thick.
Category: Epithelial Tissue
Question 2
Which does not belong?
Stratified squamous
Stratified cuboidal
Transitional epithelium
✓
Stratified columnar
Correct Answer
Transitional epithelium
A. Stratified squamous epithelium has multiple layers named by the shape of the apical cells.
B. Stratified cuboidal epithelium has two or more layers of cube-shaped cells.
C. Stratified columnar epithelium has two or more layers of column-shaped cells.
D. Transitional epithelium is found only in the urinary tract and its cells change shape when stretched. It is classified separately because of this unique distensible property.
Category: Epithelial Tissue
Question 3
Which does not belong?
Mucous membrane
Cutaneous membrane
Serous membrane
Basement membrane
✓
Correct Answer
Basement membrane
A. The cutaneous membrane (skin) is a tissue membrane covering the body exterior.
B. Mucous membranes are tissue membranes lining cavities open to the outside.
C. Serous membranes are tissue membranes lining closed internal body cavities.
D. The basement membrane is a thin extracellular layer anchoring epithelium to connective tissue. Unlike the other three, it is not a tissue membrane but a microscopic structural component.
Category: Tissue Membranes
Question 4
Which does not belong?
Synovial membrane
✓
Cutaneous membrane
Mucous membrane
Serous membrane
Correct Answer
Synovial membrane
A. The cutaneous membrane is an epithelial membrane with a stratified squamous epithelial layer.
B. Mucous membranes are epithelial membranes with an epithelial layer over connective tissue.
C. Serous membranes are epithelial membranes with a mesothelium layer.
D. Synovial membranes line joint cavities but lack an epithelial layer entirely. They are connective tissue membranes, not epithelial membranes.
Category: Membrane Classification
Question 5
Which does not belong?
Areolar tissue
Reticular tissue
Dense regular tissue
✓
Adipose tissue
Correct Answer
Dense regular tissue
A. Areolar tissue is a loose connective tissue with dispersed cells and loosely organized fibers.
B. Adipose tissue is a loose connective tissue specialized for fat storage and insulation.
C. Reticular tissue is a loose connective tissue providing supportive frameworks in organs.
D. Dense regular tissue has tightly packed parallel collagen bundles for tensile strength. It is classified as dense connective tissue, not loose.
Category: Connective Tissue Proper
Question 6
Which does not belong?
Elastic fibers
Collagen fibers
Reticular fibers
Collagenous matrix
✓
Correct Answer
Collagenous matrix
A. Collagen fibers are protein fibers providing tensile strength in connective tissue.
B. Elastic fibers contain elastin and allow tissues to stretch and recoil.
C. Reticular fibers are thin collagen-based fibers that form supportive networks.
D. Collagenous matrix is not one of the three connective tissue fiber types. The three protein fiber types found in the extracellular matrix are collagen, elastic, and reticular fibers.
Category: Connective Tissue Fibers
Question 7
Which does not belong?
Elastic cartilage
Hyaline cartilage
Calcified cartilage
✓
Fibrocartilage
Correct Answer
Calcified cartilage
A. Hyaline cartilage is the most common cartilage type, smooth with short collagen fibers in chondroitin sulfate.
B. Elastic cartilage uses elastin as the major protein for flexible support, found in the ear.
C. Fibrocartilage is tough cartilage with thick collagen bundles, found in intervertebral discs and the pubic symphysis.
D. Calcified cartilage is not one of the three cartilage types. While cartilage can become calcified with age, it is not a classification category. The three types are hyaline, elastic, and fibrocartilage.
Category: Cartilage Types
Question 8
Which does not belong?
Chondrocyte
Myocyte
✓
Fibroblast
Osteocyte
Correct Answer
Myocyte
A. Fibroblasts are the most abundant connective tissue cells, producing fibers and matrix.
B. Chondrocytes are mature cartilage cells residing in lacunae.
C. Osteocytes are mature bone cells embedded in bone matrix.
D. Myocytes are muscle cells. While the naming convention is similar, myocytes belong to muscle tissue, not connective tissue.
Category: Connective Tissue Cells
Question 9
Which does not belong?
Schwann cell
Astrocyte
Mesenchymal cell
✓
Oligodendrocyte
Correct Answer
Mesenchymal cell
A. Astrocytes are neuroglial cells in the CNS that regulate ions and help form the blood-brain barrier.
B. Oligodendrocytes are neuroglial cells that produce myelin sheaths around axons in the brain.
C. Schwann cells produce myelin sheaths around axons in the peripheral nervous system.
D. Mesenchymal cells are adult stem cells from which connective tissue cells derive. Despite sounding like a neural cell type, they are not neuroglia.
Category: Neuroglial Cells
Question 10
Which does not belong?
Transitional epithelium
✓
Endothelium
Simple squamous epithelium
Mesothelium
Correct Answer
Transitional epithelium
A. Endothelium is a simple squamous epithelium lining blood and lymph vessels.
B. Mesothelium is a simple squamous epithelium forming the epithelial portion of serous membranes.
C. Transitional epithelium is a stratified epithelium in the urinary tract with cells that change shape. It is not a simple squamous subtype.
D. Simple squamous epithelium is the general single-layer flat cell category that includes endothelium and mesothelium.
Category: Squamous Epithelium
Question 11
Which does not belong?
Ectoderm
Mesenchyme
✓
Endoderm
Mesoderm
Correct Answer
Mesenchyme
A. Ectoderm is the outer embryonic germ layer giving rise to epidermis and nervous tissue.
B. Mesoderm is the middle germ layer giving rise to connective tissue and muscle.
C. Endoderm is the inner germ layer giving rise to digestive and respiratory linings.
D. Mesenchyme is the embryonic tissue from which connective tissue derives. While it originates from mesoderm, it is not itself a germ layer but rather the first connective tissue in the embryo.
Category: Embryonic Development
Question 12
Which does not belong?
Paracrine secretion
✓
Merocrine secretion
Holocrine secretion
Apocrine secretion
Correct Answer
Paracrine secretion
A. Merocrine secretion releases substances via exocytosis without damaging the cell.
B. Apocrine secretion releases substances along with the apical portion of the cell membrane.
C. Holocrine secretion releases substances by rupturing the entire gland cell.
D. Paracrine secretion refers to cell signaling where chemicals act on nearby cells. It is a signaling method, not a gland secretion mode classified in histology.
Category: Gland Secretion
Question 13
Which does not belong?
Serous gland
Endocrine gland
✓
Mucous gland
Exocrine gland
Correct Answer
Endocrine gland
A. Exocrine glands secrete substances through ducts to body surfaces or cavities.
B. Endocrine glands release hormones directly into the blood without ducts. Unlike the other three, endocrine glands are ductless and do not secrete onto epithelial surfaces.
C. Mucous glands are exocrine glands that secrete thick, protective mucus.
D. Serous glands are exocrine glands that secrete thin, watery fluid.
Category: Gland Types
Question 14
Which does not belong?
Elastic fibers
Ground substance
Collagen fibers
Lamina propria
✓
Correct Answer
Lamina propria
A. Ground substance is the fluid or semi-fluid portion of the extracellular matrix.
B. Collagen fibers are structural protein fibers embedded in the matrix.
C. Elastic fibers are stretchy protein fibers embedded in the matrix.
D. Lamina propria is the layer of areolar connective tissue beneath a mucous membrane. It is a tissue layer, not a component of the extracellular matrix itself.
Category: Extracellular Matrix
Question 15
Which does not belong?
Desmoplastic junctions
✓
Gap junctions
Anchoring junctions
Tight junctions
Correct Answer
Desmoplastic junctions
A. Tight junctions form impermeable barriers between epithelial cells, preventing substance leakage.
B. Gap junctions create channels allowing cytoplasmic communication and molecular exchange between cells.
C. Anchoring junctions mechanically attach adjacent cells to each other or to the basement membrane.
D. Desmoplastic junctions are not a real type of cell junction. The three intercellular junction types are tight junctions, gap junctions, and anchoring junctions.
Category: Cell Junctions
Question 16
Which does not belong?
Apoptosis
✓
Wound contraction
Primary union
Secondary union
Correct Answer
Apoptosis
A. Primary union occurs when wound edges are close enough to be brought together for fast healing.
B. Secondary union occurs when wound edges are too far apart, requiring contraction and more time.
C. Wound contraction is the process of physically drawing wound borders together during healing.
D. Apoptosis is programmed cell death, a normal controlled process. It is not a wound healing mechanism but a routine cellular maintenance function.
Category: Tissue Repair
Question 17
Which does not belong?
Inflammation
Necrosis
Atrophy
Vasodilation
✓
Correct Answer
Vasodilation
A. Inflammation is a complex tissue response to injury involving swelling, redness, and heat.
B. Necrosis is the accidental, uncontrolled death of cells and tissues from injury or disease.
C. Atrophy is the loss of mass and function in a tissue or organ from disuse or aging.
D. Vasodilation is the widening of blood vessels. While it occurs during inflammation, it is a vascular event, not a tissue-level pathological condition like the other three.
Category: Tissue Pathology
Question 18
Which does not belong?
Skeletal muscle
Cardiac muscle
Dense irregular tissue
✓
Smooth muscle
Correct Answer
Dense irregular tissue
A. Skeletal muscle is voluntary, striated, multinucleated, and attached to bones.
B. Cardiac muscle is involuntary, striated, and found only in the heart wall.
C. Smooth muscle is involuntary, non-striated, and lines internal organs and vessels.
D. Dense irregular tissue is a connective tissue with randomly arranged collagen fibers. Despite being a strong tissue found in the dermis, it is not a type of muscle.
Category: Muscle Tissue
Question 19
Which does not belong?
Basal surface
Basal lamina
Reticular lamina
Apical surface
✓
Correct Answer
Apical surface
A. The apical surface is the exposed surface of an epithelial cell facing an open space or lumen. It is a cell surface orientation, not a structural layer.
B. The basal surface is the cell surface attached to underlying tissues via the basement membrane.
C. The basal lamina is a thin extracellular layer secreted by epithelial cells at their base.
D. The reticular lamina is a layer of collagen and elastin secreted by connective tissue beneath the basal lamina. Together with the basal lamina, it forms the basement membrane.
Category: Basement Membrane
Question 20
Which does not belong?
Dense connective tissue
Nervous connective tissue
✓
Fluid connective tissue
Loose connective tissue
Correct Answer
Nervous connective tissue
A. Loose connective tissue has widely spaced fibers and cells in an abundant matrix.
B. Dense connective tissue has tightly packed fibers providing strength and protection.
C. Fluid connective tissue includes blood and lymph, with cells circulating in a liquid matrix.
D. Nervous connective tissue is not a real classification. Nervous tissue is its own primary tissue type, completely separate from connective tissue.
Category: Connective Tissue Classification