A Study of Helping Behaviour in Two-Year-Olds Who Are Shy

question 71

Multiple Choice

A study of helping behaviour in two-year-olds who are shy and those who are outgoing indicated that

• A) outgoing children were more likely than shy children to help their mothers when they were hurt.
• B) shy children expressed more concern for both their mothers and a stranger than did outgoing children.
• C) shy children were more likely to help the hurt stranger than were outgoing children.
• D) shy and outgoing children did not differ in their concern for the hurt stranger.

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Definitions:

Sarcolemma

The fine transparent tubular sheath which envelops the fibers of skeletal muscles.

Sarcoplasmic Reticulum

A specialized type of endoplasmic reticulum in muscle cells that stores and releases calcium ions.

T Tubules

Tubular extensions of the cell membrane that penetrate into the center of skeletal and cardiac muscle cells, facilitating the transmission of electrical signals.

Sarcolemma

The fine transparent tubular sheath that envelops the fibers of skeletal muscles.