Biology ยท General Awareness
Skeletal and Muscular System
1,098 Questions
The skeletal and muscular system is a core topic in human biology. It covers the structure and function of bones, joints, and muscles. These concepts frequently appear in general science sections of various competitive exams. Master this topic to score higher.
Types of jointsHuman body bonesSkeletal fracturesMuscle anatomy
Skeletal and Muscular System Questions
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Gomphoses
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Synostoses
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Synchondroses
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Sutures
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None of these
E
Correct answer
Explanation
All options above are types of synarthrosis joint. Hence, this is the correct answer.
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Hyoid bone
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Nasal bone
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Vomer
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Incus
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None of these
A
Correct answer
Explanation
Hyoid is only distantly articulated to other bones by muscles or ligaments.
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Coronal suture
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Lambdoid suture
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Occipitomastoid suture
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Squamosal suture
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Dorsal suture
E
Correct answer
Explanation
It is not related with human skeletal system. All other options are types of sutures.
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Ball and socket joints
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Hinge joints
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Pivot joints
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Sutures
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None of these
E
Correct answer
Explanation
All are types of joints. Hence, this option is correct.
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Scaphoid
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Lunate
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Triquetral
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Trapezium
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Cuboid
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Tendons
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Ligaments
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Capillaries
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Cartilage
A
Correct answer
Explanation
Tendons are dense connective tissues that connect skeletal muscles to bones, transmitting muscle forces to produce movement. Ligaments connect bones to other bones, providing joint stability. Capillaries are blood vessels, and cartilage is flexible connective tissue - neither connects muscle to bone.
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Only 1
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Only 2
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Both 1 and 2
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Neither 1 nor 2
C
Correct answer
Explanation
Statement 1 is correct. The human body is supported by a framework of bones, called skeleton. The skeleton consists of 206 bones.
Statement 2 is also correct. Cartilages are found between two or more bones. They prevent bones from rubbing against each other.
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Stapes
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Femur
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Pinna
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Eustachian tube
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Skin
A
Correct answer
Explanation
It is the shortest bone of our body and is present in the middle ear.
C
Correct answer
Explanation
There are 3 small bones present in the middle ear, namely malleus, incus and stapes.
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Pterion
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Lambda
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Vertex
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Inion
A
Correct answer
Explanation
The floor of the temporal fossa is formed by the frontal and parietal bones, the greater wing of the sphenoid and the squamous part of the temporal bones. All four bones meet on each side at an H-shaped junction of sutures termed as the pterion.
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Pectineus
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Biceps femoris
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Adductor magnus
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All of the above
D
Correct answer
Explanation
Definition: Composite muscles are those, whose functions are regarded the same in terms of skeletal structure and muscle arrangement condition, as a single muscle model, e.g. vastus intermedius, lateralis and medialis working with rectus femoris on the knee joint for its extension.
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Fibrous joint
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Primary cartilaginous
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Secondary cartilaginous
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Synovial joint
D
Correct answer
Explanation
Synovial joints are called diarthroses with few exceptions (the temporomandibular joint and those involving the clavicles, which have intervening fibrocartilaginous discs). They occur between the ends or other defined surfaces of endochondral bones.
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lateral pterygoid
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medial pterygoid
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masseter
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temporalis
A
Correct answer
Explanation
When a jaw muscle contracts in the absence of a restraint, the mandible is pulled in the direction of the shortening muscle.
The lateral pterygoids are each capable of exerting about 160 N force, a total of 320 N, and yet less than 5% of this is used to protrude or open the jaw.
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proliferation and hypertrophy
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calcification and ossification
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vasculogenesis and erosion
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replacement of red bone marrow with yellow marrow
D
Correct answer
Explanation
At the epiphyseal growth plate (physes) new bone growth occurs by the process of enchondral ossification, i.e. ossification of proliferating cartilage. This process sequentially involves proliferation and hypertrophy of chondrocytes, their calcification and vascular invasion. Replacement of red bone marrow with the white marrow is not seen.
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synchondroses
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syndesmosis
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lymphysis
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schindylesis
A
Correct answer
Explanation
Cartilaginous joints are themselves classified into synchondroses (primary cartilaginous joints) and symphyses (secondary cartilaginous joints).
When fully formed, each group shares common features and also has distinctive structural and functional features. The terms primary and secondary are only useful in the instances of certain symphyses which, developmentally, are preceded by synchondroses within which further differentiation occurs.