Smooth muscle fibres are `:`

Why are the smooth muscle fibres called visceral muscle fibres?

Assertion : Smooth muscle fibres do not appear to be striated. Reason : There is a regular alternate arrangement of thick and thin filaments in smooth muscle fibre.

Single-unit smooth muscle fibres may contract automatically and rhythmically.

Write whethere the following statements are true or false : (a) Stratified squmous epithelium covers moist surfaces like buccal cavity. (b) Fibroblasts store fat in the adipose tissue. (c ) Serum albumin acts as antibody to help in body defence. (d) Transitional epithelium prevents loss of water from the blood to the urine. (e ) Blood platelets are formed from macrophages. (f) Nodes of Ranvier occur in nonmyelinated nerve fibres. (g) Single-unit smooth muscle fibres may contract automatically and rhythmically. (h) Sarcomere is a segment of striated muscle fibre between consecutive Z bands.

What is the shape of smooth muscle fibres?

The shape of smooth muscle fibre is

(a) Write about structure and function of smooth muscle fibres. (b) Briefly describe cardiac muscle fibres.

Read the following statements (i) In cardiac muscle fibres sacroplasmic reticulum is poorly formed (ii)B Blood supply is scanty in case of smooth muscle fibres (iii) Tropomyosin occurs in actin filaments in the form of complexes which are arranged over actin fibres and represent sites where myosin binds to actin. (iv) Salts of citrate and oxalates act as anticoagulants as they precipitate Ca^(2+) Select the correct statements