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Biology Flashcards > Ch 17 Locomotion last 10 yrs > Flashcards

Ch 17 Locomotion last 10 yrs Flashcards

1
Q
  1. During muscular contraction which of the following events
    occur?
    A. ‘H’ zone disappears
    B. ‘A’ band widens
    C. ‘I’ band reduces in width
    D. Myosine hydrolyzes ATP, releasing the ADP and Pi
    E. Z-lines attached to actins are pulled inwards
    Choose the correct answer from the options given below.
    (2021)

a. A, B, C, D only
b. B, C, D, E only
c. B, D, E, A only
d. A, C, D, E only

A

d. A, C, D, E only

A. ‘H’ zone disappears
C. ‘I’ band reduces in width
D. Myosine hydrolyzes ATP, releasing the ADP and Pi
E. Z-lines attached to actins are pulled inwards

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2
Q
  1. Calcium is important in skeletal muscle contraction because
    it: (2018)
    a. Binds to troponin to remove the masking of active sites
    on actin for myosin.
    b. Activates the myosin ATPase by binding to it.
    c. Detaches the myosin head from the actin filament.
    d. Prevents the formation of bonds between the myosin cross
    bridges and the actin filament.
A

a. Binds to troponin to remove the masking of active sites
on actin for myosin.

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3
Q
  1. Name the ion responsible for unmasking of active sites for
    myosin for cross–bridge activity during muscle contraction:
    (2016-II)

a. Sodium
b. Potassium
c. Calcium
d. Magnesium

A

c. Calcium

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4
Q
  1. Sliding filament theory can be best explained as: (2015)

a. Actin and myosin filaments do not shorten but rather slide
pass each other
b. When myofilaments slide pass each other, myosin
filaments shorten while actin filaments do not shorten
c. When myofilaments slide pass each other, actin filaments
shorten while myosin filament do not shorten
d. Actin and myosin filaments shorten and slide pass each
other

A

a. Actin and myosin filaments do not shorten but rather slide
pass each other

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5
Q
  1. Stimulation of a muscle fibre by a motor neuron occurs at:
    (2014)
    a. The sacroplasmic reticulum
    b. The neuromuscular junction
    c. The transverse tubules
    d. The myofibril
A

b. The neuromuscular junction

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6
Q
  1. The H-Zone in the skeletal muscle fibre is due to: (2013)
    a. Extension of myosin filaments in the central portion of
    the A-band
    b. The absence of myofibrils in the central portion of A-band
    c. The central gap between myosin filaments in the A-band
    d. The central gap between actin filaments extending through
    myosin filaments in the A-band
A

d. The central gap between actin filaments extending through
myosin filaments in the A-band

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7
Q
  1. Match List-I with List-II.

List-I List-II
A. Scapula i. Cartilaginous joints
B. Cranium ii. Flat bone
C. Sternum iii. Fibrous joints
D. Vertebral column iv. Triangular flat bone

Choose the correct answer from the options given below. (2021)

a. A-ii B-iii C-iv D-i
b. A-iv B-ii C-iii D-i
c. A-iv B-iii C-ii D-i
d. A-i B-iii C-ii D-iv

A

c. A-iv B-iii C-ii D-i

Scapula (Triangular flat bone)
Cranium (Fibrous joints)
Sternum (Flat bone)
Vertebral column (Cartilaginous joints)

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8
Q
  1. Match the following columns and select the correct option.
    (2020)
    Column-I Column-II
  2. Floating ribs i. Located between second and seventh ribs
  3. Acromion ii. Head of the humerus
  4. Scapula iii. Clavicle
  5. Glenoid cavity iv. Do not connect with the sternum(1) (2) (3) (4)
    a. (i) (iii) (ii) (iv)
    b. (iii) (ii) (iv) (i)
    c. (iv) (iii) (i) (ii)
    d. (ii) (iv) (i) (iii)
A

(1) (2) (3) (4)
c. (iv) (iii) (i) (ii)

Column-I Column-II

  1. Floating ribs Do not connect with the sternum
  2. Acromion Clavicle
  3. Scapula Located between second and seventh ribs
  4. Glenoid cavity Head of the humerus
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9
Q
  1. Select the correct option. (2019)

a. 8th, 9th and 10th pairs of ribs articulate directly with the
sternum.
b. 11th and 12th pairs of ribs are connected to the sternum
with the help of hyaline cartilage.
c. Each rib is a flat thin bone and all the ribs are connected
dorsally to the thoracic vertebrae and ventrally to the
sternum.
d. There are seven pairs of vertebrosternal, three pairs of
vertebrochondral and two pairs of vertebral ribs.

A

d. There are seven pairs of vertebrosternal, three pairs of
vertebrochondral and two pairs of vertebral ribs.

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10
Q
  1. 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: (2017-Delhi)

a. X = 12, Y = 7 True ribs are attached dorsally to vertebral
column and ventrally to the sternum

b. X = 12, Y = 5 True ribs are attached dorsally to vertebral
column and sternum on the two ends

c. X = 24, Y = 7 True ribs are dorsally attached to vertebral
column but are free on ventral side

d. X = 24, Y = 12 True ribs are dorsally attached to vertebral
column but are free on ventral side

A

a. X = 12, Y = 7 True ribs are attached dorsally to vertebral
column and ventrally to the sternum

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11
Q
  1. Glenoid cavity articulates: (2015)

a. Clavicle with scapula
b. Humerus with scapula
c. Clavicle with acromion
d. Scapula with acromion

A

b. Humerus with scapula

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12
Q
  1. The pivot joint between atlas and axis is a type of
    (2017-Delhi)

a. Fibrous joint
b. Cartilaginous joint
c. Synovial joint
d. Saddle joint

A

c. Synovial joint

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13
Q
  1. Chronic auto immune disorder affecting neuromuscular
    junction leading to fatigue, weakening and paralysis of
    skeletal muscle is called as: (2021)

a. Muscular dystrophy
b. Myasthenia gravis
c. Gout
d. Arthritis

A

b. Myasthenia gravis

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14
Q
  1. Match the following columns and select the correct option:
    (2020-Covid)Column-I Column-II
  2. Gout i. Decreased levels of estrogen
  3. Osteoporosis ii. Low Ca++ ions in the blood
  4. Tetany iii. Accumulation of uric acid crystals
  5. Muscular dystrophy iv. Auto immune disorder
    v. Genetic disorder(1) (2) (3) (4)
    a. (iii) (i) (ii) (v)
    b. (iv) (v) (i) (ii)
    c. (i) (ii) (iii) (iv)
    d. (ii) (i) (iii) (iv)
A

(1) (2) (3) (4)
a. (iii) (i) (ii) (v)

Column-I Column-II

  1. Gout Accumulation of uric acid crystals
  2. Osteoporosis Decreased levels of estrogen
  3. Tetany Low Ca++ ions in the blood
  4. Muscular dystrophy Genetic disorder
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15
Q
  1. Which of the following muscular disorder is inherited?
    (2019)

a. Tetany
b. Muscular dystrophy
c. Myasthenia gravis
d. Botulism

A

b. Muscular dystrophy

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16
Q
  1. Osteoporosis, an age–related disease of skeletal system, may
    occur due to: (2016 - II)

a. Decreased level of estrogen
b. Accumulation of uric acid leading to inflammation of joints.
c. Immune disorder affecting neuromuscular junction
leading to fatigue.
d. High concentration of Ca++ and Na+.

A

a. Decreased level of estrogen

17
Q
  1. Lack of relaxation between successive stimuli in sustained
    muscle contraction is known as: (2016-I)

a. Spasm
b. Fatigue
c. Tetanus
d. Tonus

A

c. Tetanus

18
Q
  1. Which of the following joints would allow no movement?
    (2015 Re)

a. Cartilaginous joint
b. Synovial joint
c. Ball and Socket joint
d. Fibrous joint

A

d. Fibrous joint

19
Q
  1. Select the correct matching of the type of the joint with the
    example in human skeletal system: (2014)Type of joint Example
    a. Gliding joint Between carpals
    b. Cartilaginous joint Between frontal and parietal
    c. Pivot joint Between third and fourth cervical vertebrae
    d. Hinge joint Between humerus and pectoral
A

a. Gliding joint Between carpals

20
Q
  1. The characteristics and an example of a synovial joint in
    humans is: (2013)Characteristics Examples
    a. Lymph filled between two bones, limited movement Gliding joint between carpals
    b. Fluid cartilage between two bones, limited movements Knee joints
    c. Fluid filled between two joints, provides cushion Skull bones
    d. Fluid filled synovial cavity between two bones Joint between atlas and axis
A

d. Fluid filled synovial cavity between two bones Joint between atlas and axis

21
Q
  1. Select the correct statement with respect to locomotion in humans: (2013)

a. The joint between adjacent vertebrae is a fibrous joint
b. A decreased level of progesterone causes osteoporosis in old people
c. Accumulation of uric acid crystals in joints causes their inflammation
d. The vertebral column has 10 thoracic vertebrae.

A

c. Accumulation of uric acid crystals in joints causes their
inflammation

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