MCQs for GPAT, NIPER, AIIMS Pharmacist, Railway Pharmacist, SSC, ESIC, and State Pharmacist examinations: Human Tissues.

Quick Revision Notes: Classification of Tissues

What is tissue?

A tissue is a group of similar cells along with their intercellular substance that work together to perform a specific function.

The human body contains four basic types of tissues:

1. Epithelial Tissue

2. Connective Tissue

3. Muscular Tissue

4. Nervous Tissue

A simple way to remember them is:

E-C-M-N → "Every Cell Must Network"

1. Epithelial Tissue

Epithelial tissue forms the covering of body surfaces, lines body cavities and ducts, and forms glands.

Important Structural Features

• Cells are closely packed.

• Very little intercellular matrix is present.

• Rest on a basement membrane.

• Usually avascular (lacks blood vessels).

• Shows rapid regeneration.

Classification of Epithelial Tissue

A. Simple Epithelium (single layer)

• Type Structure Location Function

• Simple squamous Flat cells Alveoli, Bowman's capsule, blood vessels Diffusion & filtration

• Simple cuboidal Cube-shaped cells Kidney tubules, thyroid gland Secretion & absorption

• Simple columnar Tall cells Stomach & intestine Absorption & secretion

• Ciliated columnar Columnar cells with cilia Fallopian tubes, respiratory tract Movement of mucus/ovum

B. Stratified Epithelium (many layers)

• Type Location Function

• Stratified squamous Skin, mouth, esophagus Protection from abrasion

• Transitional epithelium Urinary bladder & ureter Stretching and distension

High-Yield Points

• Thinnest epithelium: Simple squamous.

• Stretchable epithelium: Transitional epithelium.

• Fastest regenerating tissue: Epithelium.

• Cilia move mucus, whereas microvilli increase absorption.

2. Connective Tissue

Connective tissue supports, binds, protects, and connects different tissues and organs.

Important Structural Features

• Cells are widely separated.

• Contains abundant extracellular matrix.

• Usually well supplied with blood vessels.

• Matrix may be fluid, gel-like, or solid.

Classification of Connective Tissue

A. Connective Tissue Proper

• Type Location Function

• Areolar tissue Under skin & around organs Packing & support

• Adipose tissue Beneath skin, around kidneys Fat storage & insulation

• Reticular tissue Spleen, lymph nodes Forms supporting framework

B. Dense Connective Tissue

• Type Function

• Tendon Connects muscle to bone

• Ligament Connects bone to bone

C. Supporting Connective Tissue

• Type Location Function

• Cartilage Nose, ear, trachea Flexible support

• Bone Skeleton Support and protection

D. Fluid Connective Tissue

• Type Function

• Blood Transport of gases and nutrients

• Lymph Immunity and drainage of tissue fluid

Types of Cartilage

• Type Location

• Hyaline cartilage Trachea, nose, costal cartilage

• Elastic cartilage External ear and epiglottis

• Fibrocartilage Intervertebral discs and pubic symphysis

High-Yield Points

• Most abundant tissue in the body: Connective tissue.

• Cartilage is avascular; therefore, it heals slowly.

• Most abundant cartilage: Hyaline cartilage.

• Strongest connective tissue: Bone.

3. Muscular Tissue

Muscular tissue consists of specialised cells capable of contraction and relaxation, producing movement.

Types of Muscular Tissue

• Type Structure Control Location Function

• Skeletal muscle Striated, long, multinucleated Voluntary Attached to bones Body movements

• Smooth muscle Non-striated, spindle-shaped Involuntary Intestine, blood vessels, uterus Peristalsis & organ movement

• Cardiac muscle Striated, branched, central nucleus Involuntary HeartPumping blood

High-Yield Points

• Largest muscle tissue: Skeletal muscle.

• Intercalated discs are present only in cardiac muscle.

• Peristalsis occurs due to smooth muscle contraction.

• Cardiac muscle contracts rhythmically throughout life.

Easy Memory Trick

S-S-C = Skeleton, Stomach, Cardiac

• Skeleton → Skeletal muscle

• Stomach → Smooth muscle

• Cardiac → Heart muscle

4. Nervous Tissue

Nervous tissue receives stimuli and transmits impulses throughout the body.

Components of Nervous Tissue

A. Neurons

Functional units of the nervous system.

Parts of a Neuron

• Part Function

• Dendrites Receive impulses

• Cell body Metabolic center

• Axon Conducts impulses away from cell body

• Myelin sheath Insulates axon and increases speed of conduction

• Nodes of Ranvier Enable saltatory conduction

B. Neuroglial Cells

Supporting cells of the nervous system.

• Cell Function

• Schwann cells Form myelin in PNS

• Oligodendrocytes Form myelin in CNS

• Astrocytes Support and nourish neurons

• Microglia Phagocytic cells of CNS

• Ependymal cells Line ventricles and produce CSF

Imp. Points

• Functional unit of the nervous system: Neurone.

• Dendrites receive impulses; axons transmit impulses.

• The myelin sheath increases conduction velocity.

• Nodes of Ranvier help in saltatory conduction.

• Nervous tissue has very poor regenerative capacity.

Quick Comparison of the Four Tissues

• Feature Epithelial Connective Muscular Nervous

• Main function Covering & secretion Support & binding Movement Communication

• Cell arrangement Closely packed Widely separated Elongated fibers Neurons with processes

• Matrix Very little Abundant Minimal Minimal

• Blood supply Usually absent Usually rich Rich Rich

• Regeneration Excellent Moderate Limited Poor

Last-Minute Revision Pearls

• Simple squamous: Diffusion

• Transitional epithelium: Stretching

• Tendon: Muscle to bone

• Ligament: Bone to bone

• Smooth muscle: Peristalsis

• Cardiac muscle: Intercalated discs

• Schwann cell: PNS myelin

• Oligodendrocyte: CNS myelin

• Dendrites receive; axons send

• Connective tissue is the most abundant tissue in the body

Histology MCQs for pharmacy students

1. Which tissue type is characterised by the presence of very little intercellular matrix and closely packed cells?

A. Connective tissue
B. Nervous tissue
C. Epithelial tissue
D. Muscular tissue

Answer: C
Explanation: Epithelial tissues consist of tightly packed cells with minimal extracellular matrix.

2. Which of the following epithelial tissues is specialized for diffusion and filtration?

A. Stratified squamous epithelium
B. Cuboidal epithelium
C. Simple squamous epithelium
D. Transitional epithelium

Answer: C
Explanation: Thin flattened cells facilitate rapid diffusion in alveoli and Bowman's capsule.

3. The epithelium lining the urinary bladder is:

A. Stratified cuboidal
B. Transitional epithelium
C. Simple columnar
D. Pseudostratified columnar

Answer: B
Explanation: Transitional epithelium permits stretching during bladder filling.

4. Cilia are commonly present on:

A. Simple squamous epithelium of alveoli
B. Stratified squamous epithelium of skin
C. Pseudostratified columnar epithelium of trachea
D. Transitional epithelium of ureter

Answer: C
Explanation: Cilia help move mucus and trapped particles toward the pharynx.

5. Which epithelial tissue provides maximum protection against mechanical abrasion?

A. Simple cuboidal epithelium
B. Simple columnar epithelium
C. Stratified squamous epithelium
D. Simple squamous epithelium

Answer: C

6. Microvilli are most abundant in:

A. Skin epidermis
B. Kidney tubules and intestine
C. Urinary bladder
D. Cornea

Answer: B
Explanation: Microvilli increase absorptive surface area.

7. Which statement regarding connective tissue is correct?

A. Cells are tightly packed with no matrix.
B. It contains abundant extracellular matrix.
C. It is always vascular.
D. It is incapable of repair.

Answer: B

8. Cartilage differs from bone because cartilage:

A. Is highly vascular
B. Contains osteocytes
C. Is avascular
D. Contains Haversian systems

Answer: C

9. Which connective tissue connects muscle to bone?

A. Ligament
B. Tendon
C. Cartilage
D. Areolar tissue

Answer: B

10. Which connective tissue connects bone to bone?

A. Tendon
B. Reticular tissue
C. Ligament
D. Elastic cartilage

Answer: C

11. Which type of cartilage is found in the intervertebral discs?

A. Hyaline cartilage
B. Elastic cartilage
C. Fibrocartilage
D. Calcified cartilage

Answer: C

12. Elastic cartilage is found in:

A. Trachea
B. Costal cartilage
C. External ear pinna
D. Articular surfaces of bones

Answer: C

13. Which of the following tissues has the greatest regenerative capacity?

A. Cardiac muscle
B. Nervous tissue
C. Skeletal muscle
D. Epithelial tissue

Answer: D

14. Which muscle type possesses intercalated discs?

A. Skeletal muscle
B. Smooth muscle
C. Cardiac muscle
D. Visceral muscle

Answer: C

15. The muscle responsible for peristalsis in the gastrointestinal tract is:

A. Skeletal muscle
B. Cardiac muscle
C. Smooth muscle
D. Striated voluntary muscle

Answer: C

16. Which feature distinguishes cardiac muscle from skeletal muscle?

A. Presence of striations
B. Presence of multiple nuclei
C. Branching fibers and intercalated discs
D. Voluntary control

Answer: C

17. Skeletal muscle fibres are typically

A. Non-striated and involuntary
B. Striated and multinucleated
C. Branched and uninucleated
D. Spindle-shaped and involuntary

Answer: B

18. Which muscle type can continue rhythmic contraction without nervous stimulation?

A. Skeletal muscle
B. Smooth muscle
C. Cardiac muscle
D. All of these

Answer: C

19. The functional unit of nervous tissue is:

A. Neuroglia
B. Axon
C. Dendrite
D. Neuron

Answer: D

20. Which part of the neuron receives impulses from adjacent neurons?

A. Axon
B. Myelin sheath
C. Dendrites
D. Node of Ranvier

Answer: C

21. Myelin sheath in the peripheral nervous system is formed by:

A. Astrocytes
B. Oligodendrocytes
C. Schwann cells
D. Microglia

Answer: C

22. Saltatory conduction occurs because action potentials jump between:

A. Dendrites
B. Axon hillocks
C. Nodes of Ranvier
D. Synaptic clefts

Answer: C

23. Which neuroglial cells perform phagocytic functions in the CNS?

A. Astrocytes
B. Oligodendrocytes
C. Microglia
D. Ependymal cells

Answer: C

24. Which tissue has the least regenerative ability in adults?

A. Bone tissue
B. Connective tissue
C. Nervous tissue
D. Epithelium

Answer: C

25. Match the following:

TissueFunctionP. Simple squamous1. StretchingQ. Transitional2. Rapid diffusionR. Cardiac muscle3. Pumping bloodS. Tendon4. Muscle to bone attachment

Choose the correct option:

A. P-2, Q-1, R-3, S-4
B. P-1, Q-2, R-4, S-3
C. P-2, Q-3, R-1, S-4
D. P-4, Q-2, R-3, S-1

Answer: A

26. Which tissue type forms the stroma or supporting framework of organs?

A. Epithelial tissue
B. Nervous tissue
C. Reticular connective tissue
D. Skeletal muscle

Answer: C

27. The basement membrane is located:

A. Between connective tissue and muscle
B. Between epithelium and underlying connective tissue
C. Between neuron and glial cells
D. Between tendon and muscle

Answer: B

28. Which of the following is an example of dense regular connective tissue?

A. Dermis
B. Tendon
C. Areolar tissue
D. Adipose tissue

Answer: B

29. Which statement regarding smooth muscle is FALSE?

A. It is involuntary.
B. Cells are spindle-shaped.
C. Fibres are multinucleated.
D. It is present in blood vessel walls.

Answer: C

30. A biopsy specimen showing branching striated fibres with central nuclei most likely belongs to:

A. Skeletal muscle
B. Smooth muscle
C. Cardiac muscle
D. Tendon

Answer: C

One-Liners for Competitive Exams

• Most abundant tissue in the body: Connective tissue

• Most abundant cartilage: Hyaline cartilage

• Fastest regenerating tissue: Epithelium

• Least regenerative tissue: Nervous tissue

• Muscle with intercalated discs: Cardiac muscle

• Neuron myelinating cell in PNS: Schwann cell

• Neuron myelinating cell in CNS: Oligodendrocyte

• Stretchable epithelium: Transitional epithelium

• Gas exchange epithelium: Simple squamous epithelium

• Peristalsis muscle: Smooth muscle

Dr. Alok Singh