Q41.Match List I with List II
List I
A. Diaphysis
B. Epiphysis
C. Metaphysis
D. Endosteum
List II
I. The regions between the diaphysis and epiphysis
II. A thin membrane that lines the internal bone surface
III. The proximal and distal end of the bone
IV. The long cylindrical main portion of the bone
Choose the correct answer from the options given below :
(1) A-I, B-III, C-IV, D-II
(2) A-IV, B-III, C-I, D-II
(3) A-I, B-IV, C-II, D-III
(4) A-IV, B-II, C-I, D-III
Correct Answer: (2) A-IV, B-III, C-I, D-II
Long bones have distinct regions like diaphysis, epiphysis, metaphysis, and endosteum, each with specific anatomical roles.
Definitions
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Diaphysis (A): The shaft or main cylindrical portion of a long bone, made of compact bone with a central marrow cavity.
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Epiphysis (B): The ends (proximal/distal) of the bone, typically spongy bone covered by articular cartilage.
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Metaphysis (C): The transitional zone between diaphysis and epiphysis, active in growth and containing the epiphyseal plate in youth.
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Endosteum (D): A thin connective tissue membrane lining the internal medullary cavity and bone surfaces.
Option Analysis
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Option (1) A-I, B-III, C-IV, D-II: Wrong. Diaphysis (A) mismatches “regions between” (I); it is the shaft (IV). Epiphysis (B) fits III, but chain fails.
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Option (2) A-IV, B-III, C-I, D-II: Correct. Matches perfectly: A-shaft (IV), B-ends (III), C-between regions (I), D-membrane (II).
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Option (3) A-I, B-IV, C-II, D-III: Wrong. Diaphysis not “between regions” (I); epiphysis not shaft (IV).
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Option (4) A-IV, B-II, C-I, D-III: Wrong. Epiphysis (B) not membrane (II); endosteum not ends (III).
Long bone anatomy covers key parts like diaphysis epiphysis metaphysis endosteum, essential for biology exams. This guide matches List I (diaphysis, epiphysis, metaphysis, endosteum) with List II descriptions, with correct option (2) A-IV, B-III, C-I, D-II.
Key Parts Explained
The diaphysis forms the long shaft (IV), providing strength via compact bone.
Epiphysis are the bone ends (III), with spongy bone for joints.
Metaphysis is the growth zone between shaft and ends (I).
Endosteum lines internal surfaces (II), aiding bone remodeling.
Why Option 2 Wins
It aligns perfectly: diaphysis as shaft, epiphysis as ends, metaphysis as junction, endosteum as lining. Other options swap roles incorrectly, like confusing shaft with growth zones.
Exam Tips
Visualize a femur: shaft (diaphysis), bulbous ends (epiphysis), flared transitions (metaphysis). Practice matching boosts retention for NEET, exams on skeletal system.
