During skeletal muscle contraction, increase in calcium levels leads to binding of calcium to a subunit of _______ on ______ filaments and thereby removes the masking of active sites for ______.
Troponin, Tropomysin, Myosin
Calmodulin, Actin, Myosin
Troponin, Actin, Myosin
Cardiac muscles can be best defined as
Many cardiac muscle cells assemble in a branching pattern.
Single cardiac muscle fibre enclosed by connective tissue layer.
Group of multinucleated muscle fibres enclosed by connective tissue layer.
Group of unstriated muscle fibres enclosed by endocardium.
Which of the following is required for the breaking of cross-bridge during muscle contraction?
ATP and Ca++
ADP and Ca++
Only Ca++
ATP only
Zygomatic and sphenoid bone is an example of
Cranial bones.
Cranial bone and facial bone respectively.
Facial bone and cranial bone respectively.
Facial bone.
The calcium binding protein in smooth muscles leading to contraction is:
Calmodulin
Troponin
Tropomyosin
Ubiquitin
Consider the characters of a particular type of joint:I. It is a type of synovial jointII. It enables the bone to move in a 360° angle.III. It is exemplified by joint between humerus and pectoral girdle
What is this type of joint called?
Hinge
Ball and socket
Pivot
Saddle
The joint which play a significant role in locomotion:-
Synarthrosis
Synchondrosis
Diarthrosis
Both (1) and (3)
junction leading to fatigue
high concentration of ca++ and Na+
decreased level of oestrogen
accumulation of uric acid leading to inflammation of joints
Select the correct matching of the types of the joint with the example in human skeletal system:
1
2
3
4
Stimulation of a muscle fiber by a motor neuron occurs at:
the neuromuscular junction
the transverse tubules
the myofibril
the sacroplasmic reticulum
The length of which of the following regions shown in the given diagram of a sarcomere remains unchanged during muscle contraction?
7
6
Elbow joint is an example of
Pivot joint
Hinge joint
Glinding joint
ball and socket joint
Which one of the following is the correct matching of three items and their grouping category?
(a)
(b)
(c)
(d)
Which of the following muscular disorders is inherited?
Botulism
Tetany
Muscular dystrophy
Myasthenia gravis
Select the correct option.
There are seven pairs of vertebrosternal, three pairs of vertebrochondral and two pairs of vertebral ribs.
8th, 9th and 10th pairs of ribs articulate directly with the sternum.
11th and 12th pairs of ribs are connected to the sternum with the help of hyaline cartilage.
Each rid is a flat thin bone and all the ribs are connected dorsally to the thoracic vertebrae and ventrally to the sternum.
If production of pyruvic acid by anaerobic metabolism in a muscle is faster than it can be utilized, the surplus is converted to:
Identify the incorrectly matched pair:
Joint type
Example
1.
Knee
2.
Between atlas and axis vertebra
3.
Gliding
Between the metacarpals
4.
Between carpal and metacarpal of thumb
The number of which of the following would normally be equal in human skeleton?
In a myosin molecule HMM (heavy meromyosin) ispresent in(i) Globular head (ii) Short arm (iii) Myosin tail
(i), (ii), (iii)
(i) only
(i), (ii) only
(iii) only
Which of the following bone of the skull is not presentin pair?
Temporal bone
Sphenoid bone
Zygomatic bone
Maxillary bone
How many polypeptide chains are present in onesubunit of a myosin filament?
2 heavy chains and 2 light chains.
Which of the following hormones can play a significant role in osteoporosis?
Match the following joints with the bones involved:
Column-I
Column-II
Gliding joint
(i)
(ii)
Between Atlas and Axis
(iii)
Between the Carpals
Saddle joint
iv
Between Humerus and Ulna
Select the correct option from the following:
(a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)
(a)-(iv), (b)-(i), (c)-(ii), (d)-(iii)
(a)-(iv), (b(-(ii), (c)-(iii), (d)-(i)
(a)-(i), (b)-(iii), (c)-(ii), (d)-(iv)
Which of the following diseases is an auto-immune disorder?
Arthritis
Osteoporosis
Gout
Match the following columns and select the correct option.
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
(a) (b) (c) (d)
(i) (iii) (ii) (iv)
(iii) (ii) (iv) (i)
(iv) (iii) (i) (ii)
(ii) (iv) (i) (iii)
The total number of bones in the limb of a man is
24
30
14
21
How many vertebrae are present in the vertebral column of an adult humans?
26
20
Which of the following is the first vertebrae?
Axis
Atlas
Sacrum
Coccyx
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