In the Sliding Filament Mechanism of Muscle Contraction, the Proteins

question 143

Multiple Choice

In the sliding filament mechanism of muscle contraction, the proteins that inhibit contraction are:

• A)actin and troponin
• B)myoglobin and myosin
• C)troponin and tropomyosin
• D)troponin and myosin

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Definitions:

Dendritic Cells

Immune cells that present antigens to T cells, initiating an adaptive immune response.

Secondary Lymphatic Organ

Sites where immune responses are organized, including lymph nodes, spleen, and tonsils, which filter lymph or blood and house mature lymphocytes.

Spleen

An organ adjacent to the stomach that filters blood, disposes of worn-out red blood cells, and helps fight infection.

Lymph Node

Encapsulated mass of lymph tissue found among lymph vessels.