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locomotion and movement

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biology

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biology

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CBSE Gujarat Board Haryana Board

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Class 10 Class 12
Comment : Why red muscles are more efficient than white muscles ?

Red muscles contain plenty of mitochondria and undergo aerobic respiration. Since the red muscles have large number of mitochondria , they can provide more energy. The aerobic respiration prevents the formation of lactic acid and thus prevent muscular cramps. 
238 Views

Which type of tissue correctly matches with its location?

  • Tissue Location
    Areolar tissue Tendons
  • Tissue Location
    ATransitional epithelium Teip of nose

  • Tissue Location
    Cuboidal epithelium Tlining of stomach

  • Tissue Location
    Smooth muscle Wall of intestine


D.

Tissue Location
Smooth muscle Wall of intestine

Columnar epithelium is present in the stomach lining.
Tendon is dense connective tissue and connects muscle to bone.
Tip of nose consists of elastic cartilage. 

Columnar epithelium is present in the stomach lining.
Tendon is dense connective tissue and connects muscle to bone.
Tip of nose consists of elastic cartilage. 

1630 Views

Write differences between
(a) Actin and Myosin

Actin

Myosin

1. It is thin low molecular weight filamentous protein present in the sarcomere.

1. It is thick filamentous protein present in the sarcomere.

2. It occurs in two forms the monomeric G-actin and polymeric F-actin.

2. Each myosin molecule has two components—a tail and head. The tail is formed of heavy meromyosin (HMM) while the head is formed of light meroyosin LMM.

3. The contractile protein called tropomyosin.

3. The head has contractile property.

4. It does not act as ATPase

4. The head acts as ATPase.






429 Views

Lack of relaxation between successive stimuli in sustained muscle contraction is known as

  • fatigue

  • tetanus

  • tonus

  • spasm


B.

tetanus

Tetanus results in sustained muscular spasms. This is due to muscle fatigue.

Tetanus results in sustained muscular spasms. This is due to muscle fatigue.

3705 Views

 Write true or false. If false change the statement so that it is true.

A.

Actin is present in thin filament.

B.

 H-zone of striated muscle fibre represents both thick and thin filaments.

C.

 Human skeleton has 206 bones.

D.

There are 11 pairs of ribs in man.

E.

Sternum is present on the ventral side of the body.

A. TRUE
B. FALSE
C. TRUE
D. FALSE
E. TRUE
164 Views

Draw the diagram of a sarcomere of skeletal muscle showing different regions.
 


254 Views