Which of the following are involved in the formation of acetabulum?

a. llium

b. ischium

c. Pubis

1.  a & b only

2.  b & c only

3.  a & c only

4.  a, b & c 

How many bones are present in the human body?

1.  205

2.  206

3.  201

4.  200 

The skeleton of the head is called

1.  Hyoid

2.  Skull

3.  Ossicle

4.  Cartilage 

The anaerobic contraction of skeletal muscle causes deposition or accumulation of

1.  Gluconic acid

2.  Lactic acid

3.  Pyruvic acid

4.  Hydrochloric acid 

Muscle fatigue occurs due to the accumulation of

1.  $C{O}_2$

2.  Myosin ATPase

3.  Lactic acid

4.  Creatine phosphate 

Globular head of myosin molecule act as

1.  ATPase

2.  CTPase

3.  TTPase

4.  GTPase 

Contractile unit of muscle is part of myofibril between

1.  Z-line and l-band

2.  Z-line and Z-line

3.  Z-line and A-band

4.  A-band and l-band 

The ion that must be present in an adequate amount for binding of cross-bridges with actin is 

1.  $C{a}^{+2}$

2.  $N{a}^{+}$

3.  $K^{+}$

4.  $M{g}^{+2}$

According to the sliding filament theory of muscle contraction, the filament that move to shorten a muscle are 

1.  Myosin

2.  Actin

3.  Collagen

4.  Creatine phosphate 

In a contracted skeletal muscle fiber

1.  M line disappears

2.  H-zone elongates

3.  l-band remains constant

4.  A-band disappears