Research in People Over Age 60 Who Were Randomly Assigned

question 199

Multiple Choice

Research in people over age 60 who were randomly assigned to experience six months of aerobic exercise showed:

• A) that they developed more axons.
• B) that they developed less tumors.
• C) that they developed greater thickness of the cortex.
• D) that they developed less thickness of the cortex.

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Definitions:

Dikes

Underground structures formed when magma forces itself across rock layers and solidifies.

Shield Volcanoes

broad, gently sloping volcanoes built from highly fluid lava flows, often found in Hawaii.

Nonexplosive Outpourings

Nonexplosive outpourings refer to the gentle flow of lava from a volcano, without significant explosions or pyroclastic activity.

Lava

Molten rock expelled by a volcano during an eruption, which solidifies on the Earth's surface.