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NEET • BIOLOGY • LOCOMOTION AND MOVEMENT
Locomotion and movement practice · Mixed difficulty
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Showing 181-210 of 222 questions
181
Easy
181 of 222
Understanding
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Arrange the following steps of muscle contraction in the sequence of events occurring first I. Receptor sites on sarcolemma II. Nerve impulse III. Release of IV. Acetylcholine release V. Shortening of sarcomere VI. Synaptic cleft VII. Spread of impulse over sarcolemma on T-tubule The correct option is
View answer and explanation
Correct option: A
II → IV → VI → I → VII → III → V
Option A (II → IV → VI → I → VII → III → V) is correct because it represents the correct sequence of events in muscle contraction, starting with a nerve impulse and ending with sarcomere shortening.
182
Medium
182 of 222
Understanding
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Which one is wrongly matched?
View answer and explanation
Correct option: D
Troponin – Fibrous protein
Option D (Troponin – Fibrous protein) is wrongly matched because troponin is a globular protein, not a fibrous protein.
183
Hard
183 of 222
Remembering
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Oxygen debt' is amount of oxygen required for:
View answer and explanation
Correct option: C
Muscle recovery
Option C (Muscle recovery) is correct because 'oxygen debt' refers to the amount of oxygen needed to restore metabolic conditions to resting levels after exercise.
184
Medium
184 of 222
Remembering
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H-zone is the:-
View answer and explanation
Correct option: A
Central part of thick filament
Option A (Central part of thick filament) is correct because the H-zone is the region in the center of the A band where only thick filaments (myosin) are present.
185
Easy
185 of 222
Remembering
+4 | -1
From outer to inside, the sequence of three bones present, in the middle ear of mammals, is
View answer and explanation
Correct option: C
Malleus, incus and stapes
Option C (Malleus, incus and stapes) is correct because it represents the correct order of the ear ossicles from the outer ear to the inner ear.
186
Medium
186 of 222
Remembering
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Atlas and axis are joined by
View answer and explanation
Correct option: B
Pivot joint
Option B (Pivot joint) is correct because the atlas and axis are joined by a pivot joint, allowing for rotational movement.
187
Medium
187 of 222
Understanding
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Assertion: During exercise a person undergo fatigue very soon
Reason: During this period muscle fibres undergo oxygen debt.
Reason: During this period muscle fibres undergo oxygen debt.
View answer and explanation
Correct option: A
A and R are correct R is correct explanation for A
Option A (A and R are correct R is correct explanation for A) is correct because during exercise, fatigue occurs due to oxygen debt in muscle fibers, leading to lactic acid accumulation.
188
Easy
188 of 222
Remembering
+4 | -1
Identify the movements that are exhibited by cells in the human body
View answer and explanation
Correct option: D
A, B & C
Option D is correct. Human cells exhibit amoeboid, ciliary, and muscular movements.
189
Easy
189 of 222
Understanding
+4 | -1
Study the following statement
I. Accumulation of acidic acid in muscles causes fatigue
II. Accumulation of lactic acid in muscles causes fatigue
III. Anaerobic respiration takes place in muscles
IV. Cori cycle occurs in muscles
Choose the correct set of statements
I. Accumulation of acidic acid in muscles causes fatigue
II. Accumulation of lactic acid in muscles causes fatigue
III. Anaerobic respiration takes place in muscles
IV. Cori cycle occurs in muscles
Choose the correct set of statements
View answer and explanation
Correct option: D
II, III and IV
Option B (II, III and IV) is correct because lactic acid accumulation, anaerobic respiration, and the Cori cycle are all associated with muscle fatigue.
190
Medium
190 of 222
Understanding
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I. Myoglobin in very less quantity
II. Appear pale or whitish
III. Mitochondria are very few
IV. Sarcoplasmic reticulum in large quantity
Given characteristics of muscles fibres be long to
II. Appear pale or whitish
III. Mitochondria are very few
IV. Sarcoplasmic reticulum in large quantity
Given characteristics of muscles fibres be long to
View answer and explanation
Correct option: A
White fibres
Option A (White fibres) is correct because the characteristics listed (low myoglobin, pale appearance, few mitochondria, large sarcoplasmic reticulum) are typical of white muscle fibers.
191
Easy
191 of 222
Remembering
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Neuromuscular junction is a junction between
View answer and explanation
Correct option: C
Motor neurons and sarcolemma of muscles
Option C (Motor neurons and sarcolemma of muscles) is correct because the neuromuscular junction is the synapse between a motor neuron and the muscle fiber's membrane (sarcolemma).
192
Medium
192 of 222
Understanding
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Identify the correct statements
I. Acetylcholine is released when the neural signal reaches to the motor end plate
II. Muscle contraction is initiated by signals sent by CNS via a sensory neuron
III. During muscle contraction, isotropic bands get elongated
IV. Repeated activation of the muscles can lead to lactic acid accumulation in them
The option with correct choices is
I. Acetylcholine is released when the neural signal reaches to the motor end plate
II. Muscle contraction is initiated by signals sent by CNS via a sensory neuron
III. During muscle contraction, isotropic bands get elongated
IV. Repeated activation of the muscles can lead to lactic acid accumulation in them
The option with correct choices is
View answer and explanation
Correct option: B
I and IV
Option B (I and IV) is correct because acetylcholine release initiates muscle contraction, and repeated muscle activation can lead to lactic acid accumulation.
193
Medium
193 of 222
Analyzing
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Which of the following is correct for the given assertion (A) and reason (R)?
Assertion (A): Knee joint is hinge joint type joint.
Reason (R): Femur, patella and fibula are associated with knee joint.
Assertion (A): Knee joint is hinge joint type joint.
Reason (R): Femur, patella and fibula are associated with knee joint.
View answer and explanation
Correct option: C
(A) is true statement but (R) is false
Option C is correct because the knee joint is indeed a hinge joint, but the reason is false as the fibula is not directly associated with the knee joint articulation.
194
Easy
194 of 222
Understanding
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Cardiac muscles are different from that of skeletal muscles as the former are
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Correct option: A
Striated but involuntary
Option A (Striated but involuntary) is correct because cardiac muscles have striations like skeletal muscles but are controlled involuntarily by the autonomic nervous system.
195
Medium
195 of 222
Understanding
+4 | -1
Assertion: Rapid spasm in muscle is termed as
tetany.
Reason: Tetany is usually caused by an increase
in the blood calcium level.
tetany.
Reason: Tetany is usually caused by an increase
in the blood calcium level.
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 tetany is caused by a decrease in blood calcium levels, not an increase.
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196
Medium
196 of 222
Remembering
+4 | -1
Hydra can use its tentacles for
View answer and explanation
Correct option: D
Both (a) and (b)
Option D is correct. Hydra uses its tentacles for both capturing prey and locomotion.
197
Easy
197 of 222
Understanding
+4 | -1
Choose odd one w.r.t. properties of non-striated muscle fibres.
View answer and explanation
Correct option: A
Myofibrils show alternate light and dark bands
Option A (Myofibrils show alternate light and dark bands) is the odd one out because non-striated muscle fibers (smooth muscles) do not have the striated appearance due to the arrangement of actin and myosin.
198
Hard
198 of 222
Understanding
+4 | -1
Which one of the following bones are similar in number :
(a) Carpals of both fore limb
(b) Tarsals of both hind limb
(c) Cervical vertebrae
(d) True ribs
(e) Phalanges of both fore limb
(a) Carpals of both fore limb
(b) Tarsals of both hind limb
(c) Cervical vertebrae
(d) True ribs
(e) Phalanges of both fore limb
View answer and explanation
Correct option: C
b,d
Option C (b,d) is correct because the number of tarsals in both hind limbs is 14 (7 in each foot), and the number of true ribs is 14 (7 pairs).
199
Medium
199 of 222
Understanding
+4 | -1
Both proteins, actin and myosin are arranged in a rod-like structure in the muscles
View answer and explanation
Correct option: B
Parallely
Option B (Parallely) is correct because actin and myosin filaments are arranged parallel to each other within the muscle fibers to facilitate muscle contraction.
200
Easy
200 of 222
Analyzing
+4 | -1
How many of the following statements is/are incorrect?
A. Scapula is situated in the dorsal part of thorax between the second and the seventh ribs.
B. The striated appearance of a myofibril is due to the distribution pattern of sarcoplasmic reticulum.
C. Myosin possess oxygen storing capacity.
D. The central hollow portion of vertebra is called neural canal.
E. I-band shortens during muscle contraction.
A. Scapula is situated in the dorsal part of thorax between the second and the seventh ribs.
B. The striated appearance of a myofibril is due to the distribution pattern of sarcoplasmic reticulum.
C. Myosin possess oxygen storing capacity.
D. The central hollow portion of vertebra is called neural canal.
E. I-band shortens during muscle contraction.
View answer and explanation
Correct option: A
Two
Option A (Two) is correct because two of the statements provided are incorrect regarding the anatomy and physiology of muscles and bones.
201
Easy
201 of 222
Understanding
+4 | -1
Which one of the following is true during ageing?
View answer and explanation
Correct option: A
The decreased bone mass and increased chances of fractures
Option A (The decreased bone mass and increased chances of fractures) is correct because osteoporosis, a condition associated with aging, leads to decreased bone density and increased fracture risk.
202
Easy
202 of 222
Remembering
+4 | -1
In the thin filament of skeletal muscle fibre, a small globular protein that masks the active sites on the F-actin L, is
View answer and explanation
Correct option: D
Troponin
Option D (Troponin) is correct because troponin is the globular protein that masks the active sites on F-actin in the thin filament.
203
Easy
203 of 222
Understanding
+4 | -1
Read the following statements and select accordingly.
Statement-A : Tetany can occur due to excess of thyrocalcitonin.
Statement-B : Muscle fibre contracts to the maximum when the stimulus has atleast the threshold value.
Statement-A : Tetany can occur due to excess of thyrocalcitonin.
Statement-B : Muscle fibre contracts to the maximum when the stimulus has atleast the threshold value.
View answer and explanation
Correct option: C
Both statements A and B are correct
Option C (Both statements A and B are correct) is correct because tetany can be caused by hypocalcemia due to excess thyrocalcitonin, and muscle fibers contract maximally at or above the threshold stimulus.
204
Medium
204 of 222
Understanding
+4 | -1
Which of the following option shows correct order of some stages of muscle contraction from the beginning to the end of the process?
View answer and explanation
Correct option: B
Stimuli→ Neurotransmitter secretion→Excitation of T-system →Release of →Cross bridges formation → Sliding of actin filaments→ ‘H’ band diminishes
Option B is correct because it accurately represents the sequence of events in muscle contraction, starting from the stimulus to the diminishing of the H band.
205
Medium
205 of 222
Understanding
+4 | -1
Assertion: A person becomes fatigue very soon
during exercise.
Reason: Muscle fibres undergo oxygen debt
during exercise.
during exercise.
Reason: Muscle fibres undergo oxygen debt
during exercise.
View answer and explanation
Correct option: B
If both Assertion and Reason are true but Reason
is not the correct explanation of Assertion
is not the correct explanation of Assertion
Option B (If both Assertion and Reason are true but Reason is not the correct explanation of Assertion) is correct because while both fatigue and oxygen debt occur during exercise, oxygen debt is not the only reason for fatigue.
206
Hard
206 of 222
Understanding
+4 | -1
Read the following statements and choose the correct option.
Assertion: Ciliated protozoans are actively moving organisms
Reason: Ciliated protozoans exhibit the presence of thousands of cilia.
Assertion: Ciliated protozoans are actively moving organisms
Reason: Ciliated protozoans exhibit the presence of thousands of cilia.
View answer and explanation
Correct option: A
Both assertion and reason are true and reason is the correct explanation of assertion
Option A (Both assertion and reason are true and reason is the correct explanation of assertion) is correct because the presence of thousands of cilia enables ciliated protozoans to move actively.
207
Hard
207 of 222
Understanding
+4 | -1
Identify a wrong statement with respect to ribs.
View answer and explanation
Correct option: B
Seventh rib is usually floating in Japanese and some other people
Option B (Seventh rib is usually floating in Japanese and some other people) is correct because the seventh rib is a true rib, attached to the sternum, and not a floating rib.
208
Medium
208 of 222
Analyzing
+4 | -1
Assertion: The phase of muscle contraction occurs when myosin binds and releases actin.
Reason: Muscle contraction is initiated by a signal sent by the peripheral nervous system via motor neuron.
Reason: Muscle contraction is initiated by a signal sent by the peripheral nervous system via motor neuron.
View answer and explanation
Correct option: C
If the Assertion is correct but Reason is incorrect.
Option C is correct because the assertion is correct: muscle contraction occurs when myosin binds and releases actin. However, the reason is incorrect: muscle contraction is initiated by a signal from the *central* nervous system, not the peripheral nervous system.
209
Easy
209 of 222
Analyzing
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Assertion (A): The joint between carpal and metacarpal of thumb in humans allows movement in many directions.
Reason (R): Gliding joint is present between carpals.
Reason (R): Gliding joint is present between carpals.
View answer and explanation
Correct option: A
Assertion (A) is false but Reason (R) is true
Option A is correct because the joint between the carpal and metacarpal of the thumb allows movement in many directions due to it being a saddle joint, not a gliding joint, but the reason that gliding joints are present between carpals is true.
210
Easy
210 of 222
Remembering
+4 | -1
Which of the following bone is not a part of appendicular skeleton ?
View answer and explanation
Correct option: C
Atlas
Option B (If both assertion and reason are true but reason is not the correct explanation of assertion) is correct because both the assertion and the reason are true, but the reason does not explain why calcium is required for skeletal muscle contraction.
Revision notes and key takeaways
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