All of the Statements About the Bands Observed by Electron

question 24

Multiple Choice

All of the statements about the bands observed by electron microscopy of myofibrils are true EXCEPT:

• A) I bands show a hexagonal array of thick filaments.
• B) thin filaments are composed mainly of actin, troponin, and tropomyosin.
• C) H zones contain an array of thick filaments that are composed mainly of myosin.
• D) thick filaments are joined by cross-bridges.
• E) Z lines lie in the middle of the I bands, marking the ends of the sarcomere.

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Definitions:

Neuroimaging Techniques

Methods used in neuroscience and psychology to visualize the structure, function, or pharmacology of the nervous system and the brain.

Brain Development

The process of growth and maturation of the brain over time, influenced by genetic and environmental factors, crucial in early life but continuing into adulthood.

Secondary Intersubjectivity

A form of interaction between infant and caregiver, emerging at about 9–12 months, with communication and emotional sharing focused not just on the interaction but on the world beyond.

Primary Intersubjectivity

Organized, reciprocal interaction between an infant and a caregiver, with the interaction itself as the focus.