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Locomotion & Movement: MCQ Test

Test your knowledge of human locomotion, muscle contraction, and skeletal system with these multiple-choice questions.

Test Your Knowledge

Showing questions 81 - 100 of 201

81. Which of the following movements in mammalian skeleton represent the leverage of the third order (force applied at a paint between fulcrum and the point of resistance)?

Biceps muscle flexing arm at elbow
Triceps muscle extending arm at elbow
Gastrocnemius muscte raiSing weight of body on toes
Movement of the head of femur in the acetabulum of pelvic girdle

In a third-class lever, the effort (muscle insertion) is located between the fulcrum (joint) and the load (resistance). The flexion of the arm at the elbow by the biceps muscle exemplifies this: the elbow joint is the fulcrum, the biceps' insertion on the forearm is the effort, and the weight in the hand is the load [information not from source, but common biomechanics knowledge].

82. Which of the following abnormality will inctude the secretion of abnormal granules - pannus?

Osteoarthritis
Rheumatoid arthritis
Gout
Osteoporosis

The secretion of abnormal granules called pannus is a characteristic pathological feature of rheumatoid arthritis. This pannus accumulates on the articular cartilage, leading to its erosion and significant joint damage.

83. The cells responsible for the resorption of bone matrix during the growth and remodelling of the skeleton are called

Osteoblasts
Osteoclasts
Chondroblasts
Chondroclasts

Osteoclasts are specialized cells that are responsible for the breakdown and resorption of bone matrix. This process is essential for bone growth, repair, and the continuous remodeling of the skeletal system [information not from source].

84. Find the odd one out

Humerus, thigh, tibia and fibula, radius and ulna
Metacarpals and metatarsals, phalanges of fingers and loes
Scapula of shoulder bone, sternum, cranial bones, vertebrae
Carpals of wrist and tarsals of ankle

Options (1), (2), and (4) primarily list groups of bones that are components of the appendicular skeleton (limbs and their associated hand/foot bones). Option (3) contains bones from both the axial skeleton (sternum, cranial bones, vertebrae) and a girdle bone (scapula), making it the most diverse and therefore the odd one out.

85. Find the odd one out

Ilium, Ischium, Pubis
Deltoid ridge, Olecranon process, Trochanter
Suprascapula, Coracoid, Scapula, Trochlea
Epiphysis, Xiphisternum, Olecranon notch

Ilium, Ischium, and Pubis are three distinct bones that collectively fuse to form a single larger bone (the innominate or hip bone). In contrast, the other options list various processes or distinct anatomical features (e.g., Deltoid ridge on humerus, Olecranon process on ulna, Trochanter on femur) that are parts or projections of individual bones, not distinct bones forming a larger one.

86. When a bone breaks into more than two pieces, such a fracture is called

Simple fracture
Green stick fracture
Comminuted fracture
Compound fracture

A comminuted fracture is a type of bone fracture where the bone breaks into three or more pieces, often with smaller fragments lying between the two main fragments.

87. Bone formed by the ossification of tendon is called as

Sesamoid
Cartilage or replacing bone
Investing or dermal bone
Membranous bone

A sesamoid bone is a small, independent bone that develops directly within a tendon, typically where the tendon passes over a joint, to protect the tendon from stress and improve mechanical leverage. The patella (kneecap) is a prime example of a sesamoid bone formed within the quadriceps tendon.

88. 'All or None' rule can't be implicate on

Non straited muscles
Cardiac Muscles
Straited muscles
All the above

While the 'All or None' principle fundamentally applies to the contraction of individual muscle fibers, when considering entire muscle organs (striated, non-striated, or cardiac), the overall response often appears graded due to varying numbers of fibers recruited or specific physiological properties (e.g., cardiac muscle cannot be tetanized) [information not from source]. The answer key suggests it cannot be strictly implicated on any of these as whole units.

89. Each myofibril has a diameter of

1 to 2 mm
0.1 to 0.2 mm
.001 to .002 mm
None of the above

Myofibrils are extremely fine, cylindrical structures within muscle fibers. Their diameter is microscopic, typically ranging from 0.001 to 0.002 millimeters (or 1 to 2 micrometers) [information not from source, but common biological knowledge].

90. Myosin filaments are localized in

Z-Band
H-Band
A-Band
None of the above

The thicker primary myofilaments, composed of myosin, are specifically confined to and form the dark A band of the sarcomere.

91. Chemical ions responsible for muscle contraction are

Ca++ and K+
Na+ and K+
Na+ and Ca++
Ca++ and Mg++ ions

Calcium ions (Ca2+) are the primary trigger for muscle contraction, binding to troponin to initiate filament sliding. Magnesium ions (Mg2+) are also crucial as cofactors for the myosin ATPase enzyme, which is essential for ATP hydrolysis to power the contraction cycle [22, and information not from source regarding Mg++ cofactor role].

92. Muscles get fatigued due to accumulation of

Adenosine triphosphate
CO2
Lactic acid
Phosphate molecules

Muscle fatigue, especially during high-intensity or prolonged activity, is commonly caused by the build-up of lactic acid in the muscle fibers, a byproduct of anaerobic metabolism.

93. Basic unit of muscle contraction is

Actin
Myosin
Sarcomere
Tropomyosin

The sarcomere is the smallest fundamental repeating unit of a muscle fiber that can contract. It is the functional contractile unit located between two successive Z lines.

94. Muscle fibres having rounded ends are

Unstriped muscles
Smooth muscles
Striped muscles
All the above

According to the provided answer key, unstriped muscles (smooth muscles) are described as having rounded ends. (Note: Anatomically, smooth muscle cells are typically spindle-shaped with tapered ends, while striated muscle fibers are cylindrical with blunt ends. This description might be a simplification or specific interpretation).

95. Transmitter substance released at the synapse is

Secretin
Cholecystokinin
Cholesterol
Acetylcholin

At the neuromuscular junction, which is a type of synapse between a motor neuron and a muscle fiber, the neurotransmitter released to initiate muscle contraction is Acetylcholine (ACh).

96. Part of pectoral girdle is

Ileum
Glenoid cavity
Acetabulum
Sternum

The glenoid cavity is a component of the scapula, and the scapula itself is a key bone of the pectoral girdle (shoulder girdle). It serves as the articulation point for the head of the humerus.

97. Cervical vertebra is differentiated from other vertebra by :-

Presence of odontoid
Presence of transverse process
Amphi platyan centrum
Presence of vertebrarterial canal

Cervical vertebrae are distinct from other vertebrae due to the presence of foramina transversaria (also known as vertebrarterial canals) in their transverse processes, through which the vertebral arteries pass (except in C7).

98. Exoskeleton of rabbit have

Hair
Hair & Hoof
Hair & Claws
Hair+Claws+Hoof

The exoskeleton of a rabbit typically consists of structures like hair and claws [information not from source]. Hooves are characteristic of ungulates, not lagomorphs like rabbits.

99. Humerus is different from femur by presence of

Spines
Deltoid Ridge
Glenoid cavity
Vertebral column

The humerus (upper arm bone) can be distinguished from the femur (thigh bone) by the presence of a prominent Deltoid Ridge (deltoid tuberosity) on its shaft, which serves as the insertion point for the deltoid muscle [implied by Q.48 in Section A (Ans. 4) which links 'Deltoid Ridge' to Humerus; additional information not from source specifically comparing humerus vs femur features].

100. Scapula part of

Skull
Pelvic Gridle
Pectoral Girdle
Vertebral column

The scapula, commonly known as the shoulder blade, is a significant component of the pectoral girdle (shoulder girdle).

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Excretory Products & Their Elimination: MCQs

biology

class 11
class 12

chemistry

class 12

physics

miscellaneous

coding
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biology mcqs

class 11
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