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XI Zoology New Chap 17 Locomotion_&_Movement_114_True_or_False_Statement.
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XI_Zoology_ New Chap-17 Locomotion Movement (Statement Pairs)S# Incorrect (FALSE) Statement Correct (TRUE) Statement
Amoeboid movement is exclusive to Amoeboid movement is observed in unicellular
1
multicellular organisms. organisms like Amoeba.
Ciliary movement only occurs in the digestive Ciliary movement assists in removing dust particles
2
system. from the trachea.
Muscle contraction is irrelevant to locomotion Muscle contraction is crucial for both locomotion and
3
in living organisms. other movements in humans.
Plants do not move or exhibit any form of Animals and plants exhibit a wide range of movements,
4 locomotion; only animals have the ability to with some resulting in a change of place or location.
change position.
Locomotory structures in organisms have a Locomotory structures may serve multiple purposes,
5 single exclusive function and are never such as aiding in the movement of food and locomotion.
involved in other physiological processes.
Locomotion is entirely separate, having no Movements and locomotion are intertwined and cannot
6 connection or overlap with other forms of be studied in isolation.
movements in living beings.
Ciliary movement is the primary type of Cells in the human body display three primary types of
7 movement in muscle cells and facilitates movement: amoeboid, ciliary, and muscular, each
locomotion in the human body. serving specific functions.
Muscular movement is only necessary for Immune cells, such as macrophages and leucocytes, use
8 locomotion and does not have any other amoeboid movement facilitated by pseudopodia
functions in the human body. through protoplasmic streaming.
Amoeboid movement is solely responsible for Ciliary motion in ciliated organs aids ova movement in
9 the movement of our limbs, jaws, and tongue. the female reproductive tract and clears foreign
particles from the respiratory tract.
Skeletal muscles appear smooth under a Skeletal muscles have a striped appearance and are
10 microscope and are primarily involved in voluntary, aiding in locomotion and posture changes.
involuntary actions.
Cardiac muscles primarily contribute to Cardiac muscles form the muscle of the heart and have a
11 skeletal movement and have a linear pattern. branching pattern.
Muscle fibres have a single nucleus, allowing Muscle fibre's sarcoplasm contains multiple nuclei,
12
for precise control of muscle actions. making it a syncytium.
Muscles contribute less than 10% to the Muscles, comprising about 40-50% of body weight,
13 body's weight and have no unique properties. possess special properties like excitability and elasticity.
Visceral muscles play no role in food Visceral muscles assist in moving food through the
14
movement and are under voluntary control. digestive tract and are under voluntary control.
The striated appearance of muscles is caused Myofilaments in muscle fibres create a striated
15 by the distribution of elastic fibres within the appearance due to the distribution pattern of Actin and
myofibrils. Myosin.
Smooth muscles, despite their name, have a Smooth muscles, found in hollow visceral organs, are
16 rough, irregular appearance under a under voluntary control and have a striated appearance.
microscope.
Myofibrils consist solely of Myosin filaments, Myofibrils contain both Actin and Myosin filaments,
17 giving muscles their striated appearance. arranged alternately in the I and A bands, creating the
striated pattern in muscles.
Sarcomeres are the regions between two Sarcomeres, the functional units of contraction, are the
18 successive Z lines, where Actin and Myosin zones where Actin and Myosin filaments overlap.
filaments do not overlap.
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, XI_Zoology_ New Chap-17 Locomotion Movement (Statement Pairs)
S# Incorrect (FALSE) Statement Correct (TRUE) Statement
The light bands (I bands) in a muscle fibre are In a muscle fibre, the light bands (I bands) contain Actin
19 devoid of any filaments and are purely filaments, while the dark bands (A bands) contain
structural. Myosin filaments.
Visceral muscles, due to their location, Visceral muscles are responsible for voluntary actions
20 primarily contribute to involuntary actions like such as movement and posture changes.
digestion and reproductive processes.
The 'Z' line in a muscle fibre bisects the light The 'Z' line in a muscle fibre bisects the dark bands (A
21 bands (I bands) and holds thick filaments bands) and holds thin filaments (Actin) together.
(Myosin) together.
Actin filaments in muscles consist of multiple Actin filaments in muscles are formed by a single
22
distinct proteins forming 'F actin.' protein strand called 'F actin'.
Tropomyosin only partially covers actin Tropomyosin completely covers the actin filament,
23 filaments and regulates myosin binding sites blocking myosin binding sites at all times.
based on muscle activity.
The tail of meromyosin is called 'light The tail of meromyosin is called 'heavy meromyosin'
24 meromyosin' (LMM) because it weighs less (HMM) due to its higher molecular weight.
than the head.
Troponin is a complex protein made up of Troponin is a simple protein with no subunits and is
25 multiple subunits distributed at regular evenly distributed along the tropomyosin.
intervals on the tropomyosin.
Muscle contraction is solely determined by Muscle contraction is explained by the sliding filament
26 the sliding filament theory. theory, involving thin and thick filament interactions.
Increasing the number of motor units directly Motor units, when activated, contribute to muscle
27 decreases muscle contraction efficiency. contraction by generating force.
Tropomyosin initiates muscle contraction by Tropomyosin plays a role in muscle contraction by
28 directly binding to calcium ions. regulating the exposure of myosin-binding sites on
actin.
The release of calcium ions inhibits muscle Calcium ions play a crucial role in initiating muscle
29
contraction. contraction by binding to troponin.
Muscle contraction is purely a passive process Muscle contraction involves energy consumption,
30
and does not require energy. primarily from ATP hydrolysis.
In muscle contraction, actin filaments move During muscle contraction, actin filaments move
31
away from the center of the A band. towards the center of the A band.
The sliding filament theory suggests that thick The sliding filament theory explains muscle contraction
32 filaments slide over thin filaments during as thin filaments sliding over thick filaments.
muscle contraction.
ATP is used in muscle contraction but does not ATP hydrolysis is a fundamental energy source for
33 significantly contribute to the overall energy muscle contraction.
requirements.
Muscle contraction is initiated by electrical Muscle contraction is initiated by a signal sent by the
34 signals sent directly from the brain to the central nervous system (CNS) via a motor neuron.
muscle fibers.
Actin filaments consist of a single 'F' Each actin (thin) filament is made of two ‘F’
35 (filamentous) actin wound around myosin (filamentous) actins helically wound to each other.
filaments.
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