Question

5. Write the difference between : (a) Actin and Myosin (b) Red and White muscles (c) Pectoral and Pelvic girdle​

Answer 1

(a)The key difference between actin and myosin is that actin is a protein that produces small, contractile filaments within muscle cells, while myosin is a protein that produces thick, contractile filaments within muscle cells.

(b)Red muscles are a type of skeletal muscle which are dense with capillaries and is rich in myoglobin and mitochondria

White muscles are also a type of skeletal muscle, but contains lower amounts of myoglobin and mitochondria.

(c)The pectoral girdle stabilizes the upper limbs on the thorax and allows a range of mobility at the shoulder. ... The pelvic girdle transfers upper body weight to the lower limbs by articulating with the spine.