Locomotion and Movement (9 jan) - live session - NEET 2020Contact Number: 8527521718Locomotion and Movement (9 jan) - live session - NEET 2020Contact Number: 8527521718Nucleus pulposus is present with
(1) Cervical vertebrae
(2) Thoracic vertebrae
(3) Sacral vertebrae
(4) Intervertebral disc
Which of the following abnormal curve condition of vertebral column is an exaggeration of the thoracic curve and is also known as hunchback?
(1) Scoliosis
(2) Kyphosis
(3) Lordosis
(4) Slip disc
All of the following are present in anisotropic band in myofibrils of skeletal muscle except
(1) Hensen zone
(2) Dobie’s line
(3) M-line
(4) Myosin
Mark the incorrect statement
(1) All or none law is obeyed by skeletal muscle fibres only
(2) Each myosin filament is surrounded by six actin myofilaments
(3) In the resting state, a subunit of troponin masks the active binding sites for myosin on the actin filaments
(4) The rigidity of muscles that occurs after death is called rigor mortis
Following are the characteristics of red and white muscle fibres. Mark the incorrect one
(1) White muscle fibres are lighter in colour. Red muscle fibres are darker
(2) Red muscle fibres are rich in mitochondria
(3) White muscle fibres have well developed sarcoplasmic reticulum
(4) Red muscle fibres perform fastest rate of contraction
Which of the following is incorrect with respect to muscle relaxation?
(1) Breakdown of acetylcholine by acetylcholinesterase in the synaptic cleft, ends the generation of muscle action potential
(2) returns back to the sarcoplasmic reticulum
(3) Actomyosin synthesis starts
(4) All of these
Find the incorrect match
(1) Muscle fatigue - Accumulation of lactic acid in the muscle
(2) Hypertrophy - Increase in muscle mass due to increase in number of filaments, mitochondria and amount of sarcoplasm
(3) Isotonic contraction - When tension remains same whereas change occurs in the length of muscle fibres
(4) Single muscle twitch- Sustained contraction of a muscle fibre
Consider the following
a. Z lines move apart
b. Sarcomere shortens
c. A band shortens
d. I band remains same sized
e. H-zone disappears
Which of the above occur during muscle contraction?
(1) a, b, c, d, e
(2) b, d, e
(3) b, c, e
(4) b, e
Find the incorrect with respect to bone and its number in the forelimb of a man
(1) Humerus - 1
(2) Carpals - 7
(3) Metacarpals - 5
(4) Phalanges - 14
Mark the paired bone of the cranium
(1) Frontal
(2) Ethmoid
(3) Sphenoid
(4) Parietal
Which of the following statement is incorrect?
(1) Capitate is largest of carpal bones
(2) Glenoid cavity is associated with pectoral girdle
(3) Ulna is longer than radius and is towards the thumb
(4) Humerus is the longest bone of the upper limb
Mark the incorrect statement for osteoarthritis
(1) In osteoarthritis large weight bearing joints are affected
(2) The articular cartilages gets eroded
(3) It is a degenerative joint disease occurring in the late middle age
(4) It is caused due to excessive formation of uric acid
Which of the following is not associated with occipital bone?
(1) Unpaired
(2) Foramen magnum
(3) Condyles
(4) Cribiform plate
Calcium is important in skeletal muscle contraction because it
(1) Binds to troponin to remove the masking of active sites on actin for myosin.
(2) Activates the myosin ATPase by binding to it.
(3) Prevents the formation of bonds between the myosin cross bridges and the actin filament.
(4) Detaches the myosin head from the actin filament.
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
(1) X = 12, Y = 7 True ribs are attached dorsally to vertebral column and ventrally to the sternum
(2) X = 12, Y = 5 True ribs are attached dorsally to vertebral column and sternum on the two ends
(3) X = 24, Y = 7 True ribs are dorsally attached to vertebral column but are free on ventral side
(4) X = 24, Y = 12 True ribs are dorsally attached to vertebral column but are free on ventral side
Osteoporosis, an age-related disease of skeletal system, may occur due to
(1) Immune disorder affecting neuromuscular junction leading to fatigue
(2) High concentration of and
(3) Decreased level of estrogen
(4) Accumulation of uric acid leading to inflammation of joints
Lack of relaxation between successive stimuli in sustained muscle contraction is known as
(1) Tonus
(2) Spasm
(3) Fatigue
(4) Tetanus
Select the correct matching of the type of the joint with its example in human skeletal system:
Type of joint Example
(1) Cartilaginous joint – Between frontal and parietal
(2) Pivot joint – Between third and fourth cervical vertebrae
(3) Hinge joint – Between humerus and pectoral girdle
(4) Gliding joint – Between carpals
The H-zone in the skeletal muscle fibre is due to
(1) The central gap between myosin filaments in the A-band
(2) The central gap between actin filaments extending through myosin filaments in the A-band
(3) Extension of myosin filaments in the central portion of the A-band
(4) The absence of myofibrils in the central portion of A-band
Three of the following pairs of the human skeletal parts are correctly matched with their respective inclusive skeletal category and one pair is not matched. Identify the non-matching pair
Pairs of skeletal parts Category
(1) Humerus and ulna Appendicular skeleton
(2) Malleus and stapes Ear ossicles
(3) Sternum and Ribs Axial skeleton
(4) Clavicle and Glenoid cavity Pelvic girdle
Low in the body fluid may be the cause of
(1) Gout
(2) Tetany
(3) Anaemia
(4) Angina pectoris
Which of the following is not applicable to red muscle fibres when compared to white muscle fibres?
(1) Sustained contraction for long periods
(2) Rich in myoglobin
(3) Faster in contraction rate
(4) Rich in mitochondria
During muscle contraction, which of the following does not occur?
(1) No change in length of anisotrophic band
(2) Decrease in length of isotropic band
(3) No change in length of A band
(4) Decrease in length of actin myofilaments
What would happen if ATP suddenly were not available after the sarcomere had started to shorten?
(1) Cross bridges would not be able to detach from actin
(2) Muscle would remain in a state of rigidity
(3) Muscle would relax immediately
(4) Both (1) & (2)
Bone formed by the ossification of tendon is called
(1) Sesamoid bone
(2) Cartilage bone
(3) Investing bone
(4) Replacing bone
In which of the following fractures, the bone is broken into more than two fragments, with some of the fragments losing connection with blood circulation?
(1) Compound fracture
(2) Greenstick fracture
(3) Comminuated fracture
(4) Simple fracture
Identify the bone that is not a part of appendicular skeleton
(1) Frontal
(2) Bones of pelvic girdle
(3) Bones of limbs
(4) Fibula
How many of the following are investing bones?
Parietal, Patella, Scapula, Axis, Tarsal, Sternum, Metacarpal, Femur, Ulna, Calcaneum.
(1) Five
(2) Three
(3) Four
(4) One
Ball and socket type of synovial joint is present between
(1) Between carpals
(2) Humerus and pectoral girdle
(3) Atlas and axis
(4) Carpal and metacarpal of thumb
Which of the muscles have striation and intercalated discs within it?
(1) Myometrium
(2) Biceps
(3) Circular muscles of gut
(4) Myocardium 170.
Which portion of the pelvic girdle is involved in the formation of acetabulum?
(1) Ilium
(2) Ischium
(3) Pubis
(4) All of these
Which one of the following is not a part of myosin molecule?
(1) Light meromyosin
(2) Tropomyosin
(3) Heavy meromyosin
(4) Myosin head with actin binding sites
When a person completes a rigorous phase of physical exercise, he starts panting as the body consumes extra oxygen. What was the physiological need, that is solved by this overconsumption of oxygen?
(1) To replenish ATP and phosphocreatine store
(2) To oxidise accumulated lactic acid done in liver formed due to anaerobic breakdown of glycogen causing fatigue
(3) To replenish the oxygen store in myoglobin
(4) All of these
Which joint is present between the adjacent vertebrae in the vertebral column?
(1) Hinge joint
(2) Gliding joint
(3) Pivot joint
(4) Cartilaginous joint
During the contraction of biceps muscles, in its sarcomere, which one of the following does not occur?
(1) The length of anisotropic band shortens
(2) The length of Hensens zone (H zone) shortens
(3) The length of Isotropic band shortens
(4) The distance between two successive Zwischenscheibe lines decreases
Identify the correct option from the given information:
A. Red muscle fibres have high content of myoglobin.
B. The white muscle fibres do not get fatigued.
C. Cardiac muscles has long refractory period.
D. dependent ATPase activity is present in the myosin head.
E. The sarcoplasmic reticulum releases the stored , which binds with calcium binding site of tropomyosin on actin filaments.
(1) A, B, C, D are correct but E is incorrect
(2) B & E are incorrect while A, C & D are correct
(3) A & C are correct statements where as B, D & E are incorrect
(4) D is the only incorrect statement while A, B, C & E are the correct statements
Which one of the following is not an example of smooth muscle?
(1) Arrector pili associated with hair follicles
(2) Circular muscle in the wall of intestine
(3) Located in the wall of blood vessels i.e. arteries help in vasoconstriction and vasodilation
(4) Muscles of heart. They are involuntary, innervated by autonomic nervous system
Which one of the following is an autoimmune disorder?
(1) Osteoporosis
(2) Myasthenia gravis
(3) Muscular dystrophy
(4) Tetany
How many total vertebrochondral i.e., false ribs are present in human body?
(1) One
(2) Three
(3) Four
(4) Six
The plasma membrane of the skeletal muscle fibre is known as
(1) Sarcoplasm
(2) Syncytium
(3) Sarcolemma
(4) Sacroplasmic reticulum
Which one of the following activities does not require skeletal function for locomotion?
(1) Finding reproductive mate
(2) Searching and building of shelter
(3) Movement of food through intestine
(4) Procurement of edibles