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Structural Organisation in Animals — NEET Biology MCQs with Solutions
Free NEET Biology Structural Organisation in Animals MCQs with step-by-step solutions covering Epithelial Tissue, Connective Tissue, Muscular Tissue, Neural Tissue, Organ & Organ System, Morphology & Anatomy of Cockroach / Frog. Practise online on Prepizo — no login needed.
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Sample questions with solutions
Q1 — Epithelial Tissue · easy · theory
Epithelial tissue rests on a non-cellular basement membrane and has:
A. Contractile fibres
B. Cells compactly packed with little intercellular material ✓ Correct
C. A rich blood supply within the layer
D. Abundant matrix between cells
Solution: Epithelia are compact with minimal intercellular space, avascular, and sit on a basement membrane.
Q2 — Epithelial Tissue · easy · theory
The epithelium lining blood vessels and air sacs, made of a single layer of flat cells, is:
A. Simple squamous ✓ Correct
B. Columnar
C. Simple cuboidal
D. Stratified
Solution: Simple squamous (pavement) epithelium forms thin diffusion barriers (alveoli, capillary walls).
Q3 — Connective Tissue · easy · theory
The most abundant tissue in animals, specialised to link and support other tissues/organs, is:
A. Connective tissue ✓ Correct
B. Neural tissue
C. Epithelial tissue
D. Muscular tissue
Solution: Connective tissue has cells loosely spread in an abundant matrix and includes blood, bone, cartilage and adipose tissue.
Q4 — Connective Tissue · easy · theory
The fluid connective tissue that transports nutrients, gases and wastes is:
A. Cartilage
B. Bone
C. Areolar tissue
D. Blood ✓ Correct
Solution: Blood is a fluid connective tissue with plasma matrix and formed elements; lymph is another fluid connective tissue.
Q5 — Muscular Tissue · easy · theory
Muscle fibres attached to bones for voluntary movement are:
A. Cardiac muscle
B. Neural tissue
C. Smooth muscle
D. Skeletal (striated) muscle ✓ Correct
Solution: Skeletal muscles are striated, voluntary and attached to the skeleton; they bundle into muscle organs.
Q6 — Muscular Tissue · easy · theory
The muscle found exclusively in the wall of the heart is:
A. Skeletal muscle
B. Cardiac muscle ✓ Correct
C. Visceral muscle
D. Smooth muscle
Solution: Cardiac muscle is striated but involuntary and shows branching fibres with intercalated discs.
Q7 — Neural Tissue · easy · theory
The structural and functional unit of neural tissue is the:
A. Neuron ✓ Correct
B. Myofibril
C. Neuroglia
D. Nephron
Solution: Neurons are excitable cells that generate and transmit impulses; neuroglia support and protect them.
Q8 — Neural Tissue · easy · theory
Neuroglial cells in neural tissue function to:
A. Contract
B. Secrete hormones only
C. Support and protect neurons ✓ Correct
D. Conduct impulses like neurons
Solution: Neuroglia (more than half of neural tissue volume) support, insulate and nourish neurons.
Q9 — Organ & Organ System · easy · theory
A group of different tissues organised to perform a specific function forms an:
A. Organ system
B. Tissue
C. Cell
D. Organ ✓ Correct
Solution: Organs (e.g. stomach, heart) are made of two or more tissue types working together.
Q10 — Organ & Organ System · easy · theory
Organs that together carry out a coherent set of functions constitute an:
A. Tissue system
B. Organ system ✓ Correct
C. Cell
D. Organ
Solution: Organ systems (e.g. digestive, circulatory) are groups of organs coordinating a major function.
Q11 — Morphology & Anatomy of Cockroach / Frog · easy · theory
The excretory organs of the cockroach are the:
A. Kidneys
B. Green glands
C. Nephridia
D. Malpighian tubules ✓ Correct
Solution: Malpighian tubules at the midgut–hindgut junction remove nitrogenous waste (uric acid) in cockroaches.
Q12 — Morphology & Anatomy of Cockroach / Frog · easy · theory
The body of a cockroach is divided into three regions:
A. Head, thorax and abdomen ✓ Correct
B. Thorax and abdomen only
C. Cephalothorax and abdomen
D. Head and trunk
Solution: The cockroach body has a head, thorax (bearing legs and wings) and a segmented abdomen.
Q13 — Epithelial Tissue · easy · numerical
In the proximal convoluted tubule of the nephron and the ducts of many glands, the lining is a single layer of tall, pillar-like cells. This epithelium is best classified as:
A. Compound squamous epithelium
B. Simple cuboidal epithelium
C. Simple columnar epithelium ✓ Correct
D. Simple squamous epithelium
Solution: Tall column-like cells forming a single layer make up simple columnar epithelium, which lines the stomach, intestine and gland ducts and aids secretion and absorption.
Q14 — Epithelial Tissue · easy · numerical
A tissue must move a sheet of mucus and trapped dust steadily in one direction along the bronchi. The epithelium suited to this and the reason are:
A. Ciliated columnar epithelium, because the free surface bears motile cilia ✓ Correct
B. Squamous epithelium, because its thin cells allow rapid diffusion
C. Cuboidal epithelium, because its cube-shaped cells store secretions
D. Glandular epithelium, because it secretes lubricating mucus
Solution: Ciliated columnar epithelium carries cilia on its free surface whose coordinated beating sweeps mucus and particles along, as in the respiratory tract.
Q15 — Epithelial Tissue · easy · numerical
Which pairing of a simple epithelium with a correct location is right?
A. Simple squamous — walls of blood capillaries and alveoli ✓ Correct
B. Ciliated cuboidal — lining of the buccal cavity
C. Simple columnar — outer surface of the ovary
D. Simple cuboidal — inner lining of the urinary bladder
Solution: Simple squamous (pavement) epithelium forms the delicate lining of capillaries and alveoli where thinness favours diffusion; the other pairings are wrong.
Q16 — Epithelial Tissue · easy · numerical
Multicellular glands such as the salivary and pancreatic glands that pour their secretion through ducts onto an epithelial surface are:
A. Endocrine glands
B. Ductless glands
C. Unicellular glands only
D. Exocrine glands ✓ Correct
Solution: Exocrine glands release their products (mucus, saliva, enzymes, milk) through ducts, unlike endocrine glands which are ductless and secrete hormones into blood.
Q17 — Connective Tissue · easy · numerical
A connective tissue found beneath the skin acts as a packing between organs and stores fat. This description fits:
A. Dense regular connective tissue
B. Areolar tissue only
C. Hyaline cartilage
D. Adipose tissue (a loose connective tissue) ✓ Correct
Solution: Adipose tissue is loose connective tissue whose cells are loaded with fat; it stores lipids and cushions organs beneath the skin.
Q18 — Connective Tissue · easy · numerical
In tendons, which join muscle to bone, the collagen fibres are packed in parallel bundles giving great tensile strength. This tissue is:
A. Dense regular connective tissue ✓ Correct
B. Loose areolar connective tissue
C. Adipose connective tissue
D. Dense irregular connective tissue
Solution: Tendons are dense regular connective tissue in which collagen fibres run in the same parallel direction, giving high tensile strength along that axis.
Q19 — Connective Tissue · easy · numerical
Blood is regarded as a connective tissue mainly because it:
A. Contracts to bring about movement of the body
B. Has a fluid extracellular matrix (plasma) in which cells and proteins are suspended ✓ Correct
C. Conducts nerve impulses over long distances
D. Forms a protective covering over the body surface
Solution: Connective tissues have cells embedded in an extracellular matrix; in blood the matrix is fluid plasma, so blood is a fluid connective tissue.
Q20 — Connective Tissue · easy · numerical
Which cells of areolar connective tissue engulf and destroy invading microbes and cell debris?
A. Mast cells
B. Fibroblasts
C. Adipocytes
D. Macrophages ✓ Correct
Solution: Macrophages are phagocytic cells of connective tissue that engulf pathogens and debris; mast cells release histamine/heparin and fibroblasts secrete fibres and matrix.
Q21 — Muscular Tissue · easy · numerical
A muscle in the wall of the intestine works slowly, without conscious control, and its fibres are spindle-shaped without cross-striations. This muscle is:
A. Smooth (unstriated) muscle ✓ Correct
B. Cardiac muscle
C. Skeletal (striated) muscle
D. Voluntary striated muscle
Solution: Smooth muscle has tapering unstriated fibres and works involuntarily; it forms the walls of the alimentary canal, blood vessels and other internal organs.
Q22 — Muscular Tissue · easy · numerical
Skeletal muscle fibres are described as striated and voluntary because they:
A. Lack any bands and are found only in the heart wall
B. Are branched, uninucleate and beat rhythmically on their own
C. Are spindle-shaped and contract without conscious control
D. Show alternating light and dark bands and contract under conscious control ✓ Correct
Solution: Skeletal muscle shows cross-striations from regularly arranged actin/myosin and is under voluntary (conscious) control, being attached mainly to bones.
Q23 — Muscular Tissue · easy · numerical
Which combination correctly identifies cardiac muscle?
A. Striated, involuntary, branched fibres joined by intercalated discs ✓ Correct
B. Unstriated, involuntary, branched fibres without discs
C. Striated, voluntary, long unbranched fibres
D. Unstriated, voluntary, spindle-shaped fibres
Solution: Cardiac muscle is striated but involuntary, with branched fibres linked at intercalated discs that allow synchronised contraction of the heart.
Q24 — Neural Tissue · easy · numerical
The part of a neuron that carries impulses away from the cell body towards another neuron or an effector is the:
A. Dendrite
B. Axon ✓ Correct
C. Cell body (cyton)
D. Nissl granule
Solution: The axon is the long fibre that conducts the nerve impulse away from the cyton to the next cell, whereas dendrites bring impulses toward the cell body.
Q25 — Neural Tissue · easy · numerical
Besides neurons, neural tissue contains supporting cells that protect and support the neurons. These cells are:
A. Osteocytes
B. Neuroglia (glial cells) ✓ Correct
C. Chondrocytes
D. Mast cells
Solution: Neuroglial cells make up more than half the volume of neural tissue and support, insulate and protect neurons; they do not conduct impulses.
Q26 — Neural Tissue · easy · numerical
When a neuron is suitably stimulated, the response generated in it is:
A. A contraction that shortens the fibre
B. An electrical disturbance (nerve impulse) that travels along the membrane ✓ Correct
C. The secretion of a hormone into the blood
D. The deposition of calcium in its matrix
Solution: Neurons are excitable cells; on stimulation they generate and propagate an electrical disturbance (nerve impulse) along the plasma membrane.
Q27 — Organ & Organ System · easy · numerical
When several different tissues are organised together to perform one specific function, the resulting structure is called an:
A. Cell
B. Organ system
C. Organ ✓ Correct
D. Tissue
Solution: An organ is built of two or more tissue types integrated to carry out a definite function, such as the stomach or the heart.
Q28 — Organ & Organ System · easy · numerical
Several organs working together to perform a common set of functions constitute an:
A. Organelle
B. Organ system ✓ Correct
C. Organ
D. Tissue
Solution: An organ system is a group of organs coordinating to accomplish a broad function, e.g. the digestive system made of mouth, stomach, intestine and glands.
Q29 — Organ & Organ System · easy · numerical
The correct ascending order of structural organisation in a complex animal is:
A. Cells → tissues → organs → organ systems ✓ Correct
B. Cells → organs → tissues → organ systems
C. Organs → organ systems → tissues → cells
D. Tissues → cells → organs → organ systems
Solution: Cells group into tissues, tissues form organs, and organs combine into organ systems — the standard hierarchy of body organisation in complex animals.
Q30 — Morphology & Anatomy of Cockroach / Frog · easy · numerical
The abdomen of the cockroach (Periplaneta) is made up of how many segments?
A. 6 segments
B. 3 segments
C. 13 segments
D. 10 segments ✓ Correct
Solution: The cockroach abdomen consists of 10 segments; the thorax bears the three pairs of walking legs, not the abdomen.