Sliding filament theory can be best explained as
1. when myofilaments slide pass each other actin filaments shorten while myosin filament do not shorten
2. actin and myosin filaments shorten and slide pass each other
3. actin and myosin filaments do not shorten but rather slide pass each other
4. when myofilament slide pass each other myosin filament shorten while actin filaments do not shorten

Select the correct matching of the type of the joint with the example in human skeletal

system

Types 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 characteristics and an example of a synovial joint in humans is 

Which one of the following items gives its correct total number?

1.  Floating ribs in humans           - 4 

2.  Amino acids found in proteins  -16

3.  Types of diabetes                   - 3

4.  Cervical vertebrae in humans  - 8

In human body, which one of the following is anatomically correct ?

1. Floating ribs-2 pairs

2. Collar bones-3 pairs

3. Salivary glands-1 pair

4. Cranial nerves-10 pairs

The contractile protein of skeletal muscle involving ATPase activity is :

1. tropomyosin                 

2. myosin       

3. $\mathrm{\alpha }$-actinin                     

4. troponin

Prostaglandins have no role in 

1. inflammatory and allergic reactions

2. blood clotting 

3. smooth muscle contraction

4. conduction of nerve impulses.

If a stimulus, several times greater than the threshold stimulus is provided to a muscle

fibre, it will

1. Contract with a larger force

2. Contract with a smaller force

3. Contract with a same force

4. undergo tetany

Which one of the following is a sesamoid bone?

1. Pelvis                             

2. Patella 

3. Pterygoid                       

4. Pectoral girdle

Given diagram shows bone of the left human hindlimb as seen from front. It has certain mistakes in labeling. Two of the wrongly labelled bones are

(1) tibia and tarsals 

(2) femur and fibula

(3) fibula and phalanges

(4) tarsals and femur