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NEET • BIOLOGY • STRUCTURAL ORGANISATION IN ANIMALS
Structural organisation in animals practice · Medium
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Showing 31-60 of 122 questions
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Remembering
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Wall of blood capillary is formed of
View answer and explanation
Correct option: C
Endothelial cells
Option C (Endothelial cells) is correct because endothelial cells form the inner lining of blood vessels, including capillaries.
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Understanding
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What is true with regards to cell-cell junctions?
View answer and explanation
Correct option: D
Sometimes gap junctions connect cytoplasm of
adjoining cells for rapid transfer of big molecules
adjoining cells for rapid transfer of big molecules
Option D (Sometimes gap junctions connect cytoplasm of adjoining cells for rapid transfer of big molecules) is correct because gap junctions facilitate direct communication between cells.
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Understanding
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The function of typhlosole in earthworm
View answer and explanation
Correct option: C
Increase absorptive area of intestinal epithelium
Option C (Increase absorptive area of intestinal epithelium) is correct because the typhlosole is an internal fold in the intestine of the earthworm that increases the surface area for nutrient absorption.
34
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Remembering
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Each segment of the cockroach exoskeleton has hardened plates called
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Correct option: A
Sclerites
Option A (Sclerites) is correct because each segment of the cockroach exoskeleton has hardened plates called sclerites, which provide protection and support.
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Which of the following statement is incorrect w.r.t reproductive system and development of cockroach ?
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Correct option: D
Mushroom shaped gland is present in the 4th to 6th abdominal segments of male cockroach
Option D is correct because the mushroom-shaped gland in male cockroaches is located in the 6th-7th abdominal segments, not the 4th-6th.
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Remembering
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The fibroblasts present in the loose connective tissue produce fibres made up of
View answer and explanation
Correct option: B
Collagen
Option B (Collagen) is correct because fibroblasts in loose connective tissue produce collagen fibers, which provide strength and support to the tissue.
37
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The major constituent of connective tissue is
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Correct option: D
Collagen
Option D (Collagen) is correct because collagen is the most abundant protein in the body and a major structural component of connective tissues.
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Understanding
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Choose the correct option, pairing the principal cell with the tissue
View answer and explanation
Correct option: B
Fibroblasts – Areoloar tissue
Option B (Fibroblasts – Areoloar tissue) is correct because fibroblasts are the primary cells found in areolar tissue, responsible for producing the extracellular matrix.
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The type of epithelial cells which line inner surface of fallopian tubes, bronchioles and small bronchi are known as
View answer and explanation
Correct option: C
Ciliated epithelium
Option C (Ciliated epithelium) is correct because the fallopian tubes, bronchioles, and small bronchi are lined with ciliated epithelium to move substances.
40
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Understanding
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Which of the following statement is incorrect with reference to frog?
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Correct option: A
Teeths are present on the lower jaw of the frog
Option A (Teeths are present on the lower jaw of the frog) is correct because frogs have teeth only on their upper jaw (maxillary teeth) and vomerine teeth on the roof of their mouth, but not on the lower jaw.
41
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Remembering
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The type of tissue lining the nasal passage, bronchioles and fallopian tubes is
View answer and explanation
Correct option: A
Columnar ciliated epithelium
Option A (Columnar ciliated epithelium) is correct because it lines the nasal passage, bronchioles, and fallopian tubes to move mucus or eggs.
42
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Understanding
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Select the correct match.
A. Intercalated disc – Heart – Voluntary
B. Ligament – Connective tissue – Collagen fiber
C. Smooth muscle – Intestine – Involuntary
D. Skeletal muscle – Involuntary – Biceps
A. Intercalated disc – Heart – Voluntary
B. Ligament – Connective tissue – Collagen fiber
C. Smooth muscle – Intestine – Involuntary
D. Skeletal muscle – Involuntary – Biceps
View answer and explanation
Correct option: A
B, C
Option A (B, C) is correct because Ligament is connective tissue with collagen fibers and Smooth muscle is found in the intestine and is involuntary.
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Remembering
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Each muscle is made up of long, cylindrical fibres arranged in parallel arrays. These fibres are composed of numerous fine fibrils called
View answer and explanation
Correct option: A
Myofibrils
Option A (Myofibrils) is correct because muscle fibers are composed of numerous fine fibrils called myofibrils, which contain the contractile proteins.
44
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Analyzing
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Assertion: Cell junctions are present in the
epithelium and other tissues.
Reason: Among cell junctions, adhering
junctions help to stop substances from leaking
across a tissue.
epithelium and other tissues.
Reason: Among cell junctions, adhering
junctions help to stop substances from leaking
across a tissue.
View answer and explanation
Correct option: C
If Assertion is true but Reason is false
Option C (If Assertion is true but Reason is false) is correct because cell junctions are present in epithelium, but adhering junctions don't stop leakage; tight junctions do.
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Understanding
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Cardiac muscle cells differ from striated muscle cells in having
View answer and explanation
Correct option: C
Inter Calated discs
Option C (Inter Calated discs) is correct because intercalated discs are unique to cardiac muscle and facilitate coordinated contraction.
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Understanding
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Which of the following sense organ in frogs is not the cellular aggregation around the nerve ending?
View answer and explanation
Correct option: A
Eyes
Option A is correct because the eye in frogs is a complex organ with a lens and retina, not just a cellular aggregation around a nerve ending.
47
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Remembering
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Which among the following glands is known as ductless gland?
View answer and explanation
Correct option: B
Endocrine glands
Option B (Endocrine glands) is correct because endocrine glands secrete hormones directly into the bloodstream, lacking ducts.
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Remembering
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In a skeletal muscle fibre, the nuclei lie.
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Correct option: C
Peripherally
Option C (Peripherally) is correct because in skeletal muscle fibers, the nuclei are located peripherally, near the cell membrane.
49
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Understanding
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Which of the following statements are incorrect regarding ciliated epithelium?
I. Cells possess cilia on their free surface
II. They bear microvilli at the free ends to increase surface area of the organ
III. Mucous spreads over the epithelium as a thin layer
IV. It is found in the lining of the small intestine
I. Cells possess cilia on their free surface
II. They bear microvilli at the free ends to increase surface area of the organ
III. Mucous spreads over the epithelium as a thin layer
IV. It is found in the lining of the small intestine
View answer and explanation
Correct option: C
II and IV
Option II and IV are incorrect. Option C (II and IV) is correct because ciliated epithelium does not bear microvilli (that's absorptive epithelium), and it's not found in the small intestine (that's absorptive epithelium).
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Understanding
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Which of the following statements is/are incorrect with reference to Rana tigrina?
I. They do not have constant body temperature
II. Their skin is smooth and slippery due to the presence of a gelatinous sheath
III. Ventral side of the skin is pale yellow in colour
IV. It is also known as bull frog in India
I. They do not have constant body temperature
II. Their skin is smooth and slippery due to the presence of a gelatinous sheath
III. Ventral side of the skin is pale yellow in colour
IV. It is also known as bull frog in India
View answer and explanation
Correct option: C
Only II
Option C (Only II) is correct because the skin of Rana tigrina is smooth and slippery due to the presence of mucus, not a gelatinous sheath.
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Understanding
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Read the following types of connective tissues
[Areolar tissue, cartilage, bone, adipose tissue, and blood]
In the above, how many types of connective tissues are specialized tissues?
[Areolar tissue, cartilage, bone, adipose tissue, and blood]
In the above, how many types of connective tissues are specialized tissues?
View answer and explanation
Correct option: A
Three
Option A (Three) is correct because cartilage, bone, and blood are considered specialized connective tissues, while areolar and adipose tissues are considered loose connective tissues.
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Analyzing
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Choose the correct option to complete the analogy
Forelimbs : Four digits without webs :: Hind limbs :_____
Forelimbs : Four digits without webs :: Hind limbs :_____
View answer and explanation
Correct option: B
Five webbed digits
Option B (Five webbed digits) is correct because hind limbs of frogs have five webbed digits for swimming.
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Understanding
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Find the incorrectly matched pair.
View answer and explanation
Correct option: D
Cartilage - Areolar tissue
Option D (Cartilage - Areolar tissue) is correct because cartilage is a specialized connective tissue, while areolar tissue is a type of loose connective tissue; they are distinct tissue types, not directly related as a pair.
54
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Understanding
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Which of the following statement is/are incorrect in refer one to earthworms?
I. They are soft and naked and hence, cannot survive in the dry earth
II. They respire through the nasal openings
III. They decaying organic matter of the soil forms their chief food
IV. Rain makes the earth soft for burrowing
I. They are soft and naked and hence, cannot survive in the dry earth
II. They respire through the nasal openings
III. They decaying organic matter of the soil forms their chief food
IV. Rain makes the earth soft for burrowing
View answer and explanation
Correct option: C
II and IV
Option C (II and IV) is correct because earthworms respire through their moist skin, not nasal openings, and rain makes the earth soft, aiding in movement, not burrowing.
55
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Understanding
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Which of the following cells have a limited role in secretion and absorption
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Correct option: C
Compound epithelium
Option C is correct because compound epithelium's primary function is protection, with a limited role in secretion and absorption compared to other epithelial types.
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Analyzing
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Choose the odd member w.r.t sexuality of organism.
View answer and explanation
Correct option: A
Cockroach
Option A (Cockroach) is correct because cockroaches are dioecious (unisexual), while tapeworms, leeches, and earthworms are monoecious (bisexual).
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Remembering
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Lymphocytes are formed by
View answer and explanation
Correct option: D
None of these
Option D (None of these) is correct because lymphocytes are formed in the bone marrow and thymus, not directly by plasma cells, mast cells, or liver cells.
58
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Remembering
+4 | -1
Neuron with one axon and two or more dendrites is called
View answer and explanation
Correct option: C
Multipolar
Option C (Multipolar) is correct because a multipolar neuron is defined as having one axon and two or more dendrites, which is the most common type of neuron in the vertebrate nervous system.
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A: Lining of some hollow organs and cavities are moist.
R: This is because of the mucus secreted by the connective tissue.
R: This is because of the mucus secreted by the connective tissue.
View answer and explanation
Correct option: C
Assertion is true and reason is false
Option C (Assertion is true and reason is false) is correct because the lining of some hollow organs and cavities are moist, but this is due to mucus secreted by epithelial cells, not connective tissue.
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Analyzing
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Assertion: Simple epithelium covers surfaces
exposed to mechanical or chemical abrasions.
Reason: Protection of underlying tissues is the
major function of simple epithelium.
exposed to mechanical or chemical abrasions.
Reason: Protection of underlying tissues is the
major function of simple epithelium.
View answer and explanation
Correct option: D
If both Assertion and Reason are false
Option D (If both Assertion and Reason are false) is correct because simple epithelium is not for protection against abrasion, and protection is not its major function.
Revision notes and key takeaways
Review STRUCTURAL ORGANISATION IN ANIMALS in your textbook or class notes, then use this set to check your understanding.
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