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NEET Biology MCQ
Locomotion And Movement Mcq
Quiz 9
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Q.1
Sliding filament theory can be best explained as : …[AIPMT 2015]
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a) When myofilaments slide pass each other, Myosin filaments shorten while Actin filaments do not shorten
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b) When myofilaments slide pass each other Actin filaments shorten while Myosin filament do not shorten
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c) Actin and Myosin filaments shorten and slide pass each other
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d) Actin and Myosin filaments do not shorten but rather slide pass each other
Explanation
According to the sliding filament theory, the myosin thick filaments of muscle fibers slide past the actin (thin) filaments during muscle contraction, while the two groups of filaments remain at relatively constant length. Answer:(d)
Q.2
Glenoid cavity articulates : …[AIPMT 2015]
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a) humerus with scapula
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b) clavicle with acromion
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c) scapula with acromion
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d) clavicle with scapula
Explanation
Answer:(a)
Q.3
Lack of relaxation between successive stimuli in sustained muscle contraction is known as :- …[AIPMT-2016]
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a) Spasm
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b) Fatigue
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c) Tetanus
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d) Tonus
Explanation
A tetanic contraction is asustained muscular contraction caused by a series of nerve stimuli repeated so rapidly that individual muscular responses are fused, producing a sustained tetanic contraction. This is due to muscle fatigue. Answer:(c)
Q.4
The H-zone in the skeletal muscle fibre is due to …[NEET 2013]
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a) The absence of myofibrils in the central portion of A-band
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b) The central gap between myosin filaments in the A-band
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c) The central gap between actin filaments extending through myosin filaments in the
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d) Extension of myosin filaments in the central portion of the A-band
Explanation
H-zone in skeletal muscle is the central gap between actin filaments extending through myosin filaments in the A band Answer:(c)
Q.5
Select the correct statement with respect to locomotion in humans …[NEET 2013]B28
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a) A decreased level of progesterone causes osteoporosis in old people.
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b) Accumulation of uric acid crystals in joints causes their inflammation.
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c) The vertebral column has 10 thoracic vertebrae.
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d) The joint between adjacent vertebrae is a fibrous joint.
Explanation
Inflammation of joints due to accumulation of uric acid crystals is gout. Answer:(b)
Q.6
Name the ion responsible for unmasking of active sites for myosin for cross–bridge activity during muscle contraction. …[NEET 2016]
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a) Sodium
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b) Potassium
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c) Calcium
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d) Magnesium
Explanation
Calcium ions bind to troponin and thus cause or allow the tropomyosin strands on the actin filament to move so that the part of the actin surface where myosin heads need to bind is uncovered. Calcium the ion responsible for unmasking of active sites for myosin for cross–bridge activity during muscle contraction Answer:(c)
Q.7
Osteoporosis, an age–related disease of skeletal system, may occur due to :- …[NEET 2016]
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a) Decreased level of estrogen
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b) Accumulation of uric acid leading to inflammation of joints.
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c) Immune disorder affecting neuro–muscular junction leading to fatigue.
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d) High concentration of Ca++ and Na+.
Explanation
Type I osteoporosis uses the postmenopausal woman as the prototype, although men also rarely may suffer from the abrupt loss of sex steroids that impact greatly on the retention of bone tissue. Type II osteoporosis is age-related and typically occurs in both genders in the later decades of life; the causation of Type II is poorly understood, but it accelerates when the musculoskeletal system functions decline. Answer:(a)
Q.8
The pivot joint between atlas and axis is a type of ….[NEET- 2017]
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a) Fibrous joint
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b) Cartilaginous joint
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c) Synovial joint
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d) Saddle joint
Explanation
Synovial joints are freely movable joint which allow considerable movements. Pivot joint is a type of synovial joint which provide rotational movement as in between atlas and axis vertebrae of vertebral column. Answer:(c)
Q.9
Out of 'X' pairs of ribs in humans only 'Y' pairs are true ribs. Select the option that correctly represents values of X and Y and provides their explanation : ….[NEET- 2017]
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a) X = 12, Y = 7 True ribs are attached dorsally to vertebral column and ventrally to the sternum
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b) X = 12, Y = 5 True ribs are attached dorsally to vertebral column and sternum on the two ends
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c) X = 24, Y = 7 True ribs are dorsally attached to vertebral column but are free onventral side
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d) X = 24, Y = 12 True ribs are dorsally attached to vertebral column but are free on ventral side
Explanation
In human, 12 pairs of ribs are present in which 7 pairs of ribs (1st to 7th pairs) are attached dorsally to vertebral column and ventrally to the sternum. Answer:(a)
Q.10
Which of the following is not a function of the skeletal system? [ ReAIPMT 2015]
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a) Locomotion
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b) Production of erythrocytes
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c) Storage of minerals
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d) Production of body heat
Explanation
Most body heat is generated in the deep organs, especially the liver, brain, and heart, and in contraction of skeletal muscles. Answer:(d)
Q.11
Which of the following joints would allow no movement ? [ ReAIPMT 2015]
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a) Ball and Socket joint
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b) Fibrous joint
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c) Cartilaginous joint
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d) Synovial joint
Explanation
Fibrous joints are also called fixed or immovable joints because they do not allow any movement. These joints are immovable as they have no joint cavity or space present between the bones. They are connected via fibrous connective tissue. There are three types of fibrous joints: sutures, syndesmoses, and gomphoses. Sutures are found only in the skull, An example of a syndesmosis is the joint of the tibia and fibula in the ankle, Gomphoses occur between teeth and their sockets Answer:(b)
Q.12
Calcium is important in skeletal muscle contraction because it :-[NEET 2018]
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a) binds to troponin to remove the masking of active sites on actin for myosin.
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b) activates the myosin ATPase by binding to it.
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c) detaches the myosin head from the actin filament.
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d) prevents the formation of bonds between the myosin cross bridges and the actin filament.
Explanation
Calcium is important in skeletal muscle contraction because it Binds to troponin to remove the masking of active sites on actin for myosin. The signal for contraction increase Ca++ level many folds in the sarcoplasm.Ca++ now binds with sub-unit of troponin (troponin "C") which is masking the active site on actin filament and displaces the sub-unit of troponin. Once the active site is exposed, head of the myosin attaches and initiate contraction by sliding the actin over myosin. Answer : (a)
Q.13
tch the following columns and select the correct option. [NEET 2020]
Column-I
Column-II
(a) Floating Ribs
(i) Located between second and seventh ribs
(b) Acromion
(ii) Head of the Humerus
(c) Scapula
(iii)Clavicle
(d) Glenoid cavity
(iv) Do not connect with the sternum
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a) a → iii; b → ii; c → iv; d → i;
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b) a → iv; b → iii; c → i; d → ii;
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c) a → ii; b → iv; c → i; d → iii;
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d) a → i; b → iii; c → ii; d → iv;
Explanation
Answer:(b)
Q.14
sertion: The joints of skull are immovable. Reason: The bones of skull are joint with each other by strong collagen fibres.
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a) Both Assertion and Reason are true and Reason is correct explanation of Assertion
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b) Both Assertion and Reason are true but Reason is not correct explanation of Assertion
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c) Assertion is true but Reason is false
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d) Assertion is false but Reason is true
Explanation
Answer:(a)
Q.15
ich muscle is controlled by autonomous nervous system ?
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a) Striated muscle
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b) Visceral muscle
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c) Cardiac muscle
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d) All a, b, c
Explanation
Answer:(a)
Q.16
at is the name of complex, small globular protein?
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a) Troponin
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b) Tropomyosin
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c) Actin
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d) Meromyosin
Explanation
Answer:(a)
Q.17
w many bones, the skull is made of?
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a) 23
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b) 22
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c) 21
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d) 20
Explanation
Answer:(b)
Q.18
ich are floating rib in human?
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a) llth and 12th
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b) 9th and 10th
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c) 7th and 8th
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d) 5th and 7th
Explanation
Answer:(a)
Q.19
rough what the movement of internal organs of body occur?
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a) Skeleton muscles
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b) Voluntary muscles
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c) Non-striated muscles
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d) All type of muscles
Explanation
Answer:(c)
Q.20
ke correct pairs from the column - I and column - II.
Column I
Column - II
(P) Cervical vertebrae
(i) 4
(Q) Thoracic vertebrae
(ii) 5
(R) Lumbar vertebrae
(iii) 7
(S) Sacrum vertebrae
(iv) 12
(T) Coccygeal vertebrae
(v) 5
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a) (P-ii) (Q -iv ) (R- ii) (S - v) (T - i)
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b) (P-ii) (Q -iii) (R- i) (S - v) (T - iv)
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c) (P-iii) (Q -iv) (R- ii) (S - v) (T - i)
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d) ( P-v ) (Q -iii) (R- ii) (S - i) (T - iv)
Explanation
Answer:(c)
Q.21
tal numbers of vertebrae in human skeleton.
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a) 30
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b) 32
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c) 33
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d) 35
Explanation
The vertebral column usually consists of 33 vertebrae: 24 presacral vertebrae (7 cervical, 12 thoracic, and 5 lumbar) followed by the sacrum (5 fused sacral vertebrae) and the coccyx (4 frequently fused coccygeal vertebrae) Answer:(c)
Q.22
ve the number of Cranium bones?
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a) 8
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b) 10
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c) 14
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d) 20
Explanation
Answer:(a)
Q.23
at is the phenomenon of overstretched or torn ligaments and tendon called
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a) Sprain
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b) Dislocation
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c) Fracture
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d) Tension
Explanation
Answer:(a)
Q.24
novial fluid is secreted by
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a) Blood
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b) Cartilage
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c) Bone
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d) Synovial membrane
Explanation
Answer:(d)
Q.25
jor protein in the thick filament of skeletal muscle fibre is
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a) Tropomyosin
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b) Myosin
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c) Actin
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d) Troponin
Explanation
The myofibrils are made up of thick and thin myofilaments, which help give the muscle its striped appearance. The thick filaments are composed of myosin, and the thin filaments are predominantly actin, along with two other muscle proteins, tropomyosin and troponin Answer:(b)
Q.26
sertion: The contraction of cardiac muscle is Quick, rhythmic, powerful and never get fatigue. Reason: Intercalated disc is absence in cardiac muscle.
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a) Both Assertion and Reason are true and Reason is correct explanation of Assertion
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b) Both Assertion and Reason are true but Reason is not correct explanation of Assertion
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c) Assertion is true but Reason is false
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d) Assertion is false but Reason is true
Explanation
Answer:(c)
Q.27
sertion: The anterior region go glenoid cavity and humerus joint form joint of shoulder. Reason: The joint of shoulder is ball and socket joint.
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a) Both Assertion and Reason are true and Reason is correct explanation of Assertion
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b) Both Assertion and Reason are true but Reason is not correct explanation of Assertion
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c) Assertion is true but Reason is false
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d) Assertion is false but Reason is true
Explanation
Answer:(a)
Q.28
ich is not an example of movement in human ?
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a) Movement of jaws
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b) Movement of eyelash and tongue
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c) Movement of appendices
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d) Hearing process
Explanation
Answer:(d)
Q.29
ich muscle is controlled by sympathetic nervous system?
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a) Striated muscle
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b) Cardiac muscle
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c) Non Striated muscle
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d) All a, b, c
Explanation
Answer:(d)
Q.30
ich is essential for transmission of messages?
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a) Adrenalin
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b) Acetylcholine
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c) Noradrenalin
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d) Vasopressin
Explanation
Answer:(b)
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