Calcium Turns on Cross Bridges by Physically Repositioning the Troponin-Tropomyosin

question 198

Multiple Choice

Calcium turns on cross bridges by physically repositioning the troponin-tropomyosin complex to uncover the actin cross-bridge binding sites in

• A)skeletal muscle
• B)cardiac muscle
• C)smooth muscle
• D)striated muscle
• E)all of the above except c

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Definitions:

Anterior Chamber

The anterior chamber is the fluid-filled space inside the eye between the cornea and the iris.

Vitreous Humor

A jelly-like substance that fills the part of the eye behind the lens and helps the eye keep its shape.

Conjunctivas

Mucous membranes that cover the front of the eye and line the inside of the eyelids, playing a role in lubrication and protection against infection.

Mucous Membranes

Mucous membranes are moist tissues that line several body cavities including the mouth, nose, eyelids, and internal organs, secreting mucus for protection and moisture.