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51.

Name the functional Unit of muscles.

Answer»

Sacromere is Unit of muscles.

52.

Name the three types of muscles in humans.

Answer»

Skeletal, visceral and cardiac.

53.

What are the Locomotion of animals ?

Answer»

Some voluntary movements result in a change of place or location. Walking, running, climbing, flying, swimming are some forms of locomotory movements. 

Examples in different groups of animals.

Human beings Use limbs for locomotion. 

Hydra tentacles for locomotion.

Paramoecium Cilia helps in locomotion.

54.

Name the cells which exhibit amoeboid movement.

Answer»

Macrophages and leucocytes in blood.

55.

What are the movement of animals?

Answer»

Movement - one of the significant features of living beings. 

Examples in different group of animals.

  • Human beings can move limbs, jaws, eyelids, tongue, etc.
  • Hydra tentacles for capturing its prey.
  • Paramoecium Cilia- in movement of food through cytopharynx.
  • Amoeba Streaming of protoplasm. 
56.

What are the functions performed by vertebral column ?

Answer»
  • It protects the spinal cord;
  • It supports the head.
  • It serves as the point of attachment for the ribs.
  • Provides place for attachment of muscles of the back
57.

Differentiate between striated and smooth muscles.

Answer»
StriatedSmooth
(i) These are found attached to the skeletal elements(i) They are found in the wall of visceral organs.
(ii) Striations are prominent(ii) Striations are absent
(iii) They are voluntary in functions.(iii) They are involuntary in function
(iv) Cells are multinucleate(iv) Cells are uninucleate
(v) They are innervated by voluntary nervous system.(v) They are innervated by autonomic nervous system
58.

What causes gouty arthritis In human ?

Answer»

lnflammation of joints due to accumulation of uric acid crystals.