The Total solution for NCERT class 6-12
The differences are asfollows:
a) Actin and myosin
Actin
Myosin
Thin filaments (I-bands) of the myofilament are formed
Thick filaments (A-bands) of the myofilament are formed
It is built of globular actin monomers
It is built of meromyosin monomers
The regulatory proteins Tropnin and tropomyosin are linked with the actin
The regulatory proteins are not linked, instead each of the meromyosin is built of four light chains and two identical heavy chains
b) Red and whitemuscles
Parameters
Red muscles
White muscles
Myoglobin content
High
Low
Amount of sarcoplasmic reticulum
Moderate
Fibers
Narrow and thin
Broad and thick
Mitochondria
Possess many
Few
Fatigue
Not fatigued
Fatigued
Type of respiration from which energy is derived
Aerobic
Anaerobic
c) Pectoral and Pelvicgirdle
Pectoral girdle
Pelvic girdle
Pectoral girdle is called as the shoulder girdle
Pelvic girdle is called as the hip girdle
Each part/half of the girdle consists of two bones – clavicle and scapula
Each part/half of the girdle consists of three bones – ischium, ilium and pubis
Forelimb articulation is offered
Hindlimb articulation is offered
Head of the humerus articulates with the glenoid cavity of the pectoral girdle
Head of the femur articulates with the acetabulum of the pelvic girdle