What are the components of the thin filaments of a muscle cell?

Answer 1

Actin, Tropomyosin and troponin.

Thin filament which is #7-8nm"# in diameter is one of the two filaments vital for muscular contractions. It is composed of three proteins that are:

Actin #to# The thin filaments are composed chiefly of actin proteins. That's why these filaments are also called as actin filaments. The actin molecules are arranged in to chains. This chains twist around each other like twisted double strand of pearls.
Tropomyosin #to# Two strands of another protein twist around actin, This protein is tropomyosin.
Troponin #to# This is another protein in thin filament. It is actually #3# polypeptide complex: #"troponin I, troponin C & troponin T"#. Out of these: troponin I binds to actin and troponin T binds to tropomyosin. Troponin C binds calcium ions#(Ca^(2+))# in order to start muscle contraction.

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Answer 2

David Arnold

The components of the thin filaments of a muscle cell are actin, tropomyosin, and troponin.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.